Well that is what many people are doing, wasting food is exactly the same thing.
If you have a few odd boiled potatoes left, why not chop them up add a few chives and a little mayonnaise and there you have a portion of potato salad.
Stale bread can be made into breadcrumbs, bread and butter pudding, croutons.
Left over pasta can be eaten cold with some salad.
Stale french stick can be made into bruschetta.
Fruit can be made into a crumble.
Bendy veg can be made into a soup.
A little leftover pastry can be made into some jam tarts.
There are so many things you can do, just use your imagination.
Today I cleaned out the fridge and there were some bendy carrots, squishy tomatoes and floppy looking celery, I just added some onions, red pepper, seasoning, herbs and a few slices of chilli, some chicken stock which I made the other day from boiling up the chicken carcuss.
Cooked up and whizzed, it made some lovely soup for lunches.
Learn to love your leftovers.