Last night's leftover chilli - fry an onion and some garlic, then add passata, tinned tomatoes, 2 tsp ground cumin. Bring to boil then let it simmer for about 15 mins. Then add a small tin of sweetcorn, tin of kidney beans, tin of pinto beans, half a tin of baked beans and diced red and green pepper. Add dried chilli flakes and/or chilli powder to taste. Simmer for another 15 mins.
Free on Green (and EE), makes a good size batch and freezable.