That half tin of sweet corn is something we meet here. I sometimes heat it as a veg with dinner, with a bit of butter, tasty and dd will eat it. Or use it in ANSI goreng, using up another tin if tuna, leftover rice and bits of veg, handful of frozen prawns and some curry powder. Nasi, not ANSI.
Creme fraiche gets stirred into chilli (DH makes it spicier than I love), added to fajitas, spooned into chorizo potatoes (baby opt atones,,half a chorizo chopped, pack of lardons and a jar of tomato and chilli sauce all mixed together and roasted for an hour til spuds cooked).
I use ends of veg, like courgettes, mushrooms and peppers, by chopping into small dice along with onions and a few garlic cloves, seasoning with oregano, salt and pepper, dash balsamic vinegar and some olive oil, roasting for about 25 mins and using as a side veg,, mixed into couscous or pasta and tomato sauce, and can be frozen also.
I end up throwing out cooked meats not used, sometimes I can use them cooked but not always.
Bananas. Although I have recently learned to mush and freeze them for banana bread later.
I sometimes get a chance to crumb leftover bread and freeze it for stuffings etc.
If I misjudge milk buying, I cannot do anything with it normally,wraps make rice pudding or cheese sauce for pasta or cauliflower, I'll freeze some but not a lot (sauce not whole milk).
Leeks can get forgotten, but ten ill do a big batch of buttered leeks and freeze what I don't use, for making cheesy leeks pasta whe DH is away.
Sorry about typos, iPad doesn't like my spellings and chooses weird replacements. And can't keep up with my speed either.