Frozen onion (haven’t chopped on in years) and frozen sliced peppers - both are really handy for batch cooking a meal.
Aldi do a really nice “fish and chip shop” beer battered cod (box of 4). It comes up lovely and crispy - was way nicer than what I’d get from our local takeaways.
They’ll never be as good as me doing it from scratch, but frozen roast potatoes and yorkshires mean that a roast can be thrown together fairly easily if I don’t feel up to doing it all myself.
I’m ordering meat from a local butcher. I slice chicken breasts into individual portions and freeze them - easy to get out and defrost required amounts to throw together a stir fry/fajitas etc. same with their homemade meatballs, bag into portions and take out what you need.
I keep a few frozen pies in there - not the healthiest, but I like them! And can be used as an alternative for a roast dinner.
Scampi is a favourite. And frozen prawns, which I bag into individual portions - handy for a stir fry, Thai curry, making a sandwich etc.
Fish fingers - easy meal (and can’t beat a fish finger sandwich!)
Meat that’s on offer - will nab it and freeze so that there’s choice for various recipes.
I batch cook bolognaise and curries so that there are always individual portions handy.
More for the summer, but I’ll always have some lollies to hand - and will never buy branded again! Aldi do great Valencia Orange lollies - 89p for a pack of four, way cheaper and just as nice as Del Monte etc. and their version of magnums are lovely, especially the salted caramel - again, around 89p for a box.