Fried or scrambled eggs, baked beans, and oven chips or toast
Pasta, jar sauce, either frozen veg chucked in with the pasta for the last few minutes or the pre-chopped prepared veg in packs that you can microwave or similarly add in. If you can't use a sieve, get the packs of microwave pasta and sauce instead. Top with cheese, you can get packs of pre-grated if you can't grate (or cba, I love these).
Pasta bake - add in some deli meat like ham, pepperoni. Serve with salad (ready-made pack and cherry tomatoes if you like).
Stir-fry. Tesco and M&S have an offer on noodles, prepared meat/ prawns/ tofu (cooked, just need heating up), prepared stir-fry veg and a sachet of sauce, sure other supermarkets also do them. So quick and easy.
Jacket potatoes with beans and/ or cheese, or tuna mayo, etc and salad
Salmon fillet cooked in oven or grilled (can get ready cooked so just need heating or raw), stir fry veg, rice (microwave packs if you want or need), stir-fry sauce on veg and if you want to go the extra mile, bung a bit on the salmon when it's nearly done for the last few minutes. Or make your own sauce - soy sauce, honey, ginger, chilli, garlic. Ready-chopped tubes or jars of garlic etc are your friend.
Pasta, cook until almost done (to taste, avoids overdoing so it's sloppy), drain then return to pan or do microwave packs. Tuna, tinned tomatoes and garlic or tomato pasta sauce from jar or packet, tinned sweetcorn, whatever tinned veg you want, simmer for a few minutes. Top with cheese.