Low waste, Plant-based cooking
Notes prepared by Scott Hitchins, 2025
The Low waste Cook
A low waste diet could also be referred to as a Low Energy-use or Low Carbon diet, a low greenhouse gas-emissions diet or even a Low death-and-destruction-of-the-planet diet!
When deciding what and how, to eat, there are many factors to consider:
Energy used to grow the food, such as use of fertilisers or stock feed, herbicides & pesticides, farm machinery, greenhouses, water pumping and so-on.
Transport and processing of the food, such as planes, trains, ships and trucks (and the distance they travel), washing, heating, chilling (including during travel), cooking, percentage of original product discarded (bones, stems, peels etc.) length of storage, such as apples in cold storage for up to two years or meats frozen for up to a year…
Packaging, including recyclable, non-recyclable and reusable containers, excessive packaging for the sake of brand promotion, packaging for wholesale transport to point of sale and re-packaging (such as plastic bags) at point of sale.
Further processing and waste at home by refrigeration, cooking, freezing, reheating, peeling, trimming, utilising leftovers, binning, composting, or feeding to the chooks.
Nose to tail and Root to Shoot
A key area where we can reduce food waste in our homes is in making sure that we use every part of the plant or animal that we can> Broccoli stems, Bones from a rotisserie chicken, Radish tops (and the tops of many other root vegetables), Potato and carrot peels, and many other foods which often go to waste, can be made into components of delicious family meals that are environmentally friendly and wallet-friendly.
These factors and many others, make choosing the best options for the environment very difficult and there are no absolutes. For example, when choosing by the popular ‘Food Miles’ method, a study in the US found that it was less carbon intensive to purchase many French wines that had been shipped to the USA than it was to purchase most local wines due to the difference in carbon generated during production.
Some guidelines we can use when shopping
Less packaging is better.
Dry goods, such as beans, lentils, pasta, rice, spices etc will have less embodied carbon than when these goods are purchased already cooked and canned or packaged.
Animal derived foods such as meat, eggs and dairy will usually have a higher embodied carbon than plant derived foods. Much of this carbon derives from growing plants to feed the animals.
Locally sourced, in-season, sustainably grown fruit and vegetables usually can only be beaten by home grown fruit and vegetables.
How much energy it takes to cook your food is an important consideration.
If you buy it, you eat it. Wasted food equals Methane emitted from landfills.
Most of us are aware that too much meat can be a bad thing, although, in moderation, it is an excellent source of complete proteins, easily assimilable iron and vitamins such as B12. Many people are reducing their level of meat consumption for health reasons but there are some very good environmental and sustainability reasons:
By changing our approach to animal proteins in our diet, we can, collectively, have a huge environmental impact while improving our health, and the health of our wallets. Some of the many food philosophies open to us are Vegetarian, Carnivore, Vegan, Lacto-ovo vegetarian, Fruitarian, Pescatarian, Flexitarian, Raw vegan, Freegan, Locavore, and I-can’t-eat-it, its-got-a-face-atarian (See Darwin’s theory on ‘Survival of the Fluffiest’ for more details).
Key Questions to help you assess or change your favourite dishes
Does it really need meat to taste the way I like it?
Can I swap-in a plant-based source of protein, such as beans or tofu and still get much the same dish? Will we even notice the difference? Can I flavour up the dish with non-meat meaty flavours such as, browned onions and other vegies, miso paste, mushrooms, roasted capsicum, eggs, or cheese (Parmesan cheese is particularly high in meaty ‘Umami’ flavours)? Can I remove meat simply by adding more veggies or rice, pasta, etc?
Can I get a more sustainable, lower impact version of that meat?
Buying smaller portions of meat makes it more affordable to be able to make choices such as Organic, Free range, Grass fed, Locally Produced, Sustainably Managed, Low Food Miles, Fair Trade, Dolphin Friendly and all the others. Of course, proceed with your eyes open: While most of these are genuine, there are plenty of tricks, traps and ‘Green washing’ out there. Make sure your changes are putting genuine pressure on manufacturers to change and not just to make a quick buck off the latest fad.
Today’s Recipes
Pizza is any easy, inexpensive and family friendly way to make leftovers and otherwise-wasted fridge and pantry bits into a delicious meal.
Basic dough recipe:
- 2C plain flour (half wholemeal & half white is good)
- 1/2 tsp salt
- 1tsp sugar
- About 1tsp dried yeast
- Lukewarm water; ~ 2/3C
Pre heat oven to 200-220-C
- Mix dry ingredients in a bowl.
- Add enough of the water to make a firm dough.
- Turn out onto bench & knead until smooth and no longer sticky (at least 10 minutes).
- Cover and leave in a warm place until doubled in size (about 20-30 minutes).
- Knead again briefly.
- Roll, punch or cut to shape and place onto grease tray. Top with pesto
- Bake until just beginning to colour on top (about 12 minutes), top with rocket and a drizzle of olive oil and then slide pizza onto bare oven shelf or pizza tile for another 5 minutes or so.
Radish Leaf Pesto Pizza
- Leaves from two bunches of radishes (about 3 cups) Turnip, carrot, and beetroot leaves can also be used, but should be blanched first to reduce their pungency.
- 2 cloves garlic or more if you want
- 1/4 cup olive oil
- 1/3 cup shredded pecorino or parmesan cheese (or plant-based substitutes)
- Small handful of fresh coriander leaves (optional)
- Pinch of salt
Thoroughly wash and dry radish leaves. Remove woody stems and put in blender or food processor with remaining ingredients. Blend until smooth. Use on pasta, pizza, as a dip, or spooned onto a rare steak or grilled chicken fillet.
Seared Broccoli bits pizza
- Some broccoli stems and florets, chopped into small bits and the pan-fried with a bit of olive oil on high heat until they get a bit brown and crispy.
- Tomato paste, passata or whiz-up those slightly squishy tomatoes before it’s too late.
- Herbs, garlic, chili, whatever you fancy.
- Maybe some meat bits, marinated tofu, small tin of tuna in oil (drained) or even crack a couple of eggs on top just before baking.
- Some cheesy stuff you have on hand.
Tomato first, cheese last, chuck it in the oven
Roast apple dessert pizza
- Quarter and core some apples (no need to peel) End-of-week apples that are getting a bit wrinkly are fine, Most other fruits can be used, as long as they are not too watery after cooking
- Roast-off the apples until soft and a little bit charred.
- Whiz or chop finely.
- Spread over pizza base, dust with cinnamon, and blob soft brown sugar here and there, so that it cooks into toffee puddles. Serve as it is, or with Greek yoghurt or cream or ice-cream
More Recipes to try at home
Veggies bits Mac ‘n’ Cheese
INGREDIENTS
- 500g pasta shapes, such as macaroni or penne. Cook as per packet instructions.
- 500g cauliflower, broccoli or cabbage stems, peeled and cut into small chunks. Peeled cauliflower or broccoli stems are great for this; keep in the freezer until you have enough. Other veggie bits can be included
- 2 tablespoons plain flour
- 40g butter
- 500ml (2 cups) milk of your choice
- [2 bay leaves, 1 onion roughly chopped, lots of pepper, couple of whole cloves, pinch of nutmeg]
- About a cup of grated cheese such as parmesan or tasty, plus 1/2cup extra on top (plant-based cheeses can also be used)
- Some parsley or other herbs that you like or need to use up.
- 2 teaspoons wholegrain or Dijon mustard
- 1/2c fresh breadcrumbs (whizz-up leftover bread and keep in a bag in the freezer)
EQUIPMENT
You will need about a 2 litre ovenproof dishes for this recipe. – or divide into individual dishes’
METHOD
- Chop up the veggies and put into a covered microwave-proof dish with a splash of water. Microwave until tender. Cool and blitz in food processor or in batches in your Nutribullet-type smoothy maker.
- Preheat oven to 180C. Cook the pasta, following packet directions, adding the cauliflower for the last 4 minutes of cooking time, until al dente. Drain and transfer to a large bowl.
Make the bechamel
- Melt the butter in a saucepan and then add flour, stir and cook on medium for two minutes. Set aside. This is called a Roux and is used to thicken many soups, sauces and gravies.
- Heat the milk slowly with all the aromatics in the brackets. This step is vital to a good bechamel.
- Very gradually add the strained milk to the roux, whisking as you go, to get a smooth paste. Return to the cleaned saucepan and bring to the boil (it won’t thicken unless it reaches a boiling point) reduce to a simmer and cook for at least 10 minutes, stirring frequently.
- Add in the veggie puree, cheese, mustard, any herbs, and other flavourings you like
- Mix into your drained pasta and then into your greased ovenproof dish (greasing is to make cleaning easier). Top with extra cheese and breadcrumbs. Bake until well-browned and bubbly; 20-30 minutes.
- Serve into bowls or keep in fridge for hungry kids and teens to microwave and scoff at their leisure.
A hearty dish of what’s in the garden or in the back of the fridge
This is infinitely variable and will ideally depend on what is in the garden or at least, on what is in season in the shops or market. As an example:
- 1 cup of green beans, stems trimmed
- 1 cup snow peas or sugar snaps or shelled peas. Remove any stringy bits.
- 1 cup zucchini slice into even slices
- 1 cup baby potatoes; boiled until just tender; slice into ~1cm slices
- A handful of mint or other herbs chopped
- 1 bunch spring onions or some spring onion tops from the garden sliced fairly finely You can save the bottom ~10cm of a bunch of spring onions and re-grow them in a jar of water on a sunny windowsill or even plant them directly into the garden.
- 1 bunch flat leaf parsley, chopped coarsely
- 4 really fresh eggs poached
- ¼ cup of butter
- Juice of 1 lemon
- Salt and pepper to taste
METHOD
- Steam, poach, microwave, sauté or stir fry the vegetables. –keep them on the crunchy side.
- Toss the drained vegetables in the butter, stir through lemon juice and herbs.
- Arrange on four plates and top each with a poached egg.
- Omit the butter and try other sauces; go Asian, or Greek or Mexican or whatever. Omit the egg and replace with fried tofu or a sliced spicy sausage or some pan fried fish or chicken
More tips for low carbon cooking
- Use lids on pots and pans to retain heat and enable cooking with less energy
- Keep the fridge closed.
- Choose energy efficient appliances and consider if those appliances are as useful as you think (do you really need a bread maker to stick next to the ice-cream maker, the tortilla press and the crepe maker?)
- Double the cook and halve the energy: Cook double batches of stews, curries, pasta sauces etc, and save half for another time. Using the oven for dinner? –make the dessert a baked item as well, or roast some veggies to go with tomorrow night’s dinner.
- Boil only as much water as you need for a cup of tea or for cooking vegetables.
Quick Peanut Sauce
Turns a pile of roasted, steamed, or fresh veggies into a meal
INGREDIENTS
- 1/3 c peanut butter
- 1/4 c honey (or other liquid sweetener of choice)
- 1/4 c sesame oil (for that toasty flavour)
- 1/4 c apple cider vinegar or Japanese rice vinegar. -if using one of the stronger rice vinegars from Southeast Asian countries, use less.
- 1 t powdered ginger
- Put it all in a jar and shake to combine. Toss through veggies and serve cold, room temperature or warm.
Notes: The shake method works best with the lid on.
If the peanut butter wont dissolve, microwave the jar of dressing (minus the lid) for thirty seconds and shake again.
Roasted vegetable soup
Use any vegetables that you have available, roasted up to make double use of the oven while baking a cake or pizza or doing a classic family roast. Think along the lines of classic Pumpkin soup and you’ll get the vibe. This is a great way to use up veggies when, individually, there is not enough of each to be of use, but together, they add-up to a meal. Serves four to six.
INGREDIENTS
- About 650g leftover roast pumpkin (see recipe above)
- 2-3 roasted onions or dice and fry some
- 700ml-1 litre vegetable stock, A few gratings of nutmeg
- Proteins of your choice; leftovers from roasts are ideal or drop in a tub of Silken Tofu.
- 3 tbsp olive or canola oil
METHOD
- Remove any too burnt or dry bits, and tough or papery skin.
- Purée the vegetables in a blender until smooth, then thin with stock until it’s the texture you like.
- Pour into a pot, grate over a little nutmeg and warm through.
- Adjust the seasoning to taste.