Use it up: meals from leftovers and scraps

Leftover chicken: four meals

Leftover roasted chicken is the highest-ROI fridge item. You've already paid for it and cooked it. Now you're just rearranging.

1. Chicken fried rice (50 cents in extra ingredients)

Shred the leftover chicken. Heat oil in a large pan or wok, crack in 2 eggs, scramble until just set, then push to the side. Add 2 cups of leftover rice (day-old is ideal; fresh rice gets mushy). Toss in the eggs. Add 2 tablespoons of soy sauce, 1 cup of frozen vegetables (peas, corn, carrots), and the chicken. Fry for 3-4 minutes. Serve with a squeeze of lime.

Cost: eggs (20 cents), soy sauce (10 cents), frozen veg (20 cents). Rice and chicken are already in the fridge.

2. Chicken quesadillas (1 dollar for wraps and cheese)

Shred the chicken. Toss with salsa if you have it. Lay a flour tortilla flat, top with chicken, shredded cheese, maybe some sauteed capsicum or onion, then fold. Pan-fry in a bit of oil or butter until the cheese melts and the wrap crisps. Cut into triangles.

Cost: tortillas (50 cents), cheese (50 cents). Serves 2 as a main or 4 as a snack.

3. Chicken soup (stock is the only ingredient)

Shred the chicken. Heat a litre of chicken or vegetable stock (or water with a stock cube). Add the chicken, any vegetables in your crisper drawer (onion, carrot, celery, diced tomato), a pinch of salt and pepper. Simmer 10 minutes. Done.

Cost: stock cube (20 cents) if you don't have stock. Vegetables are getting thrown away otherwise.

4. Chicken pasta bake (2 dollars extra)

Cook 300g of pasta. Drain. Mix with the shredded chicken, a jar of tomato pasta sauce (1 dollar), a pinch of salt, and a handful of grated cheese. Tip into a baking dish, top with more cheese, bake at 180C for 20 minutes until bubbling. Feeds 4.

Cost: pasta (50 cents), sauce (1 dollar), cheese (50 cents).

Stale bread: four solutions

Stale bread is not bin food. It's better than fresh for half these recipes.

1. French toast (50 cents)

Whisk 2 eggs with a splash of milk, a teaspoon of cinnamon, and a tablespoon of sugar. Slice the stale bread, dip in the mix, and pan-fry in butter until golden. Serve with jam or maple syrup if you have it. Stale bread absorbs the egg mixture better than fresh.

Cost: eggs (20 cents), milk (10 cents), cinnamon and sugar (free if you have them).

2. Bread and butter pudding (1 dollar)

Cube the bread and layer it in a baking dish. Whisk 3 eggs, 200ml milk, 50g sugar, and a teaspoon of vanilla together. Pour over the bread. Let sit 15 minutes so the bread soaks it up. Bake at 180C for 30 minutes. Serve with custard if you have it, or just eat it warm with a cup of tea.

Cost: eggs (30 cents), milk (40 cents), sugar (20 cents), vanilla (10 cents).

3. Croutons (free)

Cube the bread. Toss with a bit of oil, salt, and pepper. Spread on a baking tray and bake at 180C for 10-15 minutes until golden and crispy. Store in an airtight container and use on soups, salads, or Caesar dressing for a week. This is the single easiest way to turn waste into a staple.

Cost: oil and salt you have.

4. Breadcrumbs (free, freezer-friendly)

Blitz the stale bread in a food processor or blender until it becomes crumbs. Spread on a baking tray and dry at 160C for 10 minutes. Cool. Freeze in portions and use for coating chicken, binding meatballs, or topping baked pasta.

Cost: electricity to run the oven.

Wilting vegetables: five uses

The moment a vegetable looks sad is when it's most versatile. It's soft enough to cook down, strong enough to add flavour.

1. Stir-fry

Chop whatever vegetables you have (wilting broccoli, soft zucchini, browning capsicum, sad mushrooms). Heat oil in a wok or large pan. If you have protein (chicken, leftover meat, tofu, eggs), cook that first. Remove. Add vegetables in batches, starting with the harder ones. When everything's soft, return the protein, add soy sauce, garlic if you have it, and maybe a splash of oyster sauce. Serve over rice.

Cost: oil and soy sauce. Vegetables are already on their way out.

2. Soup

Chop everything. Simmer in water or stock with salt and pepper for 15-20 minutes until soft. Blend if you want it smooth, or leave chunky. You've just made vegetable soup from scraps.

3. Frittata

Chop the vegetables finely. Cook them in a bit of oil in an oven-safe frying pan until soft (5 minutes). Whisk 8 eggs with salt and pepper, pour over the vegetables, and cook on the stove for 3 minutes until the edges set. Finish under the griller for 2-3 minutes. Cut into wedges.

Cost: eggs (60 cents). Vegetables are waste otherwise.

4. Pasta sauce

Dice and cook the vegetables in oil until they break down (8-10 minutes). Add a tin of tomatoes (50 cents), salt, pepper, and a pinch of garlic or chilli if you have it. Simmer 10 minutes. Serve over pasta.

Cost: tomatoes, oil. Vegetables are base ingredients.

5. Roast vegetables

Chop the vegetables, toss with oil, salt, and pepper. Roast at 200C for 25-30 minutes until caramelised. Serve as a side or toss through pasta, couscous, or salad. Roasting caramelises the sugars, so soft vegetables taste better roasted than raw.

Leftover rice: three meals

Cooked rice lasts 4-5 days in the fridge if you store it properly. Don't waste it.

1. Fried rice (already covered above, but it's the gold standard)

2. Rice pudding (milk, sugar, cinnamon)

Pour 1 cup of leftover rice into a saucepan. Add 400ml milk (tinned or fresh), 2 tablespoons of sugar, and a teaspoon of cinnamon. Stir occasionally over medium heat for 10 minutes until the rice is soft and the mixture is creamy. Serve warm or cold. If it's too thick, add more milk.

Cost: milk (30 cents), sugar and cinnamon (10 cents).

3. Stuffed capsicums

Cut the tops off 2 capsicums and remove the seeds. Mix 1 cup of leftover rice with 200g cooked mince (or diced leftover chicken), half a tinned tomato, diced onion if you have it, and salt and pepper. Stuff the capsicums, place in a baking dish, pour a splash of water around them, and bake at 180C for 30 minutes.

Cost: mince or chicken (if not leftover), tomato (20 cents). Capsicums and rice are base.

Overripe bananas: three uses

Overripe bananas are too soft for eating but perfect for cooking.

1. Banana bread (2 dollars)

Mash 3 ripe bananas. Mix with 150g melted butter (or oil), 200g sugar, 1 egg, 1 teaspoon vanilla. In a separate bowl, combine 300g flour, 1 teaspoon baking soda, and a pinch of salt. Fold the dry into the wet. Pour into a lined loaf tin and bake at 180C for 50 minutes.

Cost: butter (60 cents), sugar (40 cents), egg (20 cents), flour (40 cents). Makes 12 slices.

2. Smoothies

Blend 2 bananas with yoghurt (or milk), a handful of frozen berries, and a tablespoon of honey. Done. Bananas are the base; frozen berries and yoghurt are the variation.

3. Banana pancakes (just banana and egg)

Blend 2 ripe bananas with 2 eggs. Cook spoonfuls in a pan like normal pancakes. No flour needed. Serve with jam or honey.

Cost: eggs (40 cents). Bananas are waste otherwise.

Nearly-off milk: two uses

Milk that's still fresh but days from expiry is perfect for baking.

1. Scones (1 dollar)

Mix 300g flour, 2 teaspoons baking powder, 50g butter, and a pinch of salt. Add 150ml milk to bring it together into a dough. Shape into 8 rounds, place on a baking tray, brush with a bit more milk, and bake at 200C for 15 minutes until golden. Serve with jam and cream or just with butter.

Cost: flour (30 cents), butter (40 cents), milk (30 cents).

2. Pancakes or crepes

Whisk 2 eggs, 200ml milk, 150g flour, a pinch of salt, and 1 teaspoon of sugar. Cook spoonfuls in a pan. Serve with jam, honey, or maple syrup.

The zero-dollar meal

This is the final form of using it up: a complete dinner with no additional shopping.

You have: leftover roasted chicken, day-old rice, wilting broccoli, a half-can of soy sauce, and 2 eggs. You also have oil, salt, and pepper.

Fried rice. 30 minutes from fridge to plate. Total cost: $0. And it's better than 90% of takeaway.

Or: stale bread, 3 eggs, milk, cinnamon. French toast. 15 minutes. $0.50 if you count the cinnamon and sugar.

Or: wilting spinach, mushrooms going soft, half an onion, 8 eggs, cheese. Frittata. 20 minutes. $0.80 for the eggs.

The zero-dollar meal isn't about deprivation. It's the moment you realise the scraps in your fridge are more valuable than the takeaway menu on your phone. That's when your food budget stops being a problem and starts being a superpower.

The weekly impact

Australians throw away food with an average value of $2,000-3,000 per household per year. If you're shopping for a family of 4, that's 40-60 dollars per week disappearing into landfill.

You can't prevent all waste. But you can claim the waste that's still edible.

Use one leftover chicken for fried rice, quesadillas, and soup. That's 3 meals for the cost of the chicken you'd have bought anyway. Turn stale bread into croutons instead of throwing it out. Blend 3 overripe bananas into banana bread instead of buying a cake.

Over a week, that's 20-40 dollars saved. Over a year, it's 1,000-2,000 dollars. For a lower-income household, that's the difference between affording school camp, paying down debt, or getting ahead on rent. For any household, it's money that stays in your account instead of becoming waste.

And the meal? The meal is usually better. Chicken soup from bone broth is more nourishing than canned. Banana bread made from overripe bananas is sweeter and more flavourful than store-bought. Fried rice uses whatever protein and vegetables you have, so it's always different.

Waste isn't waste until you decide it is.