Super quick meals, pretty much 2 minutes' prep time maximum:
Bag of salad from the supermarket, couple of jars of pickles you like, tin of Mackerel in flavoured olive oil/tuna, precooked salmon or prawns, punnet of cherry tomatoes - half the salad in a bowl, few cherry tomatoes, add some spoonfuls of beetroot/olives/sandwich gherkins, open tin and dump fish on top, add lemon juice/pepper if you've got it, maybe a bread roll - 30-odd seconds from opening the salad to ready to eat.
Next lunch - other half of salad bag, different fish.
Microwaved packs of veg and new potatoes.
Microwave jacket potatoes.
Maybe a bag of microwave rice + prawns or cooked chicken with salad.
Breakfasts - big blob of yoghurt, some dates, some brazils/walnuts/pecans and some seeds, tablespoon or two of cereal on top. Maybe get some strawberries for a couple of days or banana, maybe kiwi, whatever fruit you like. Or plain yoghurt, dates, nuts & seeds, blob of peanut butter and some fortified chocolate cereal on top.
Feeling a bit cold and miserable? Make up some chicken stock from a cube, throw in some rice noodles, frozen peas, couple of cherry tomatoes quartered, a few prawns or chicken, cut up a spring onion with scissors, add soy and some chilli flakes. Do it in a largish mug, stick a saucer over the top and by the time the noodles are soft and the peas are warmed through, it's cool enough to drink/eat.
Minimal time in the kitchen, minimal effort, as it's largely opening things, but a lot of colour, nutrition and flavour.