Couscous. All you need to do is put boiling water on it, cover for five minutes and fork through some olive oil or butter.
Of course it is very bland so I usually jazz it up with one of more of the following:
Vegetable stock instead of water (in fact, I always use this). I usually also put some dried thyme, marjoram or oregano in the water too.
Sun dried tomatoes (not packed in oil but just dry) reconstituted in balsamic vinegar. I chop these and mix through. They keep submerged in vinegar for a week or more in the fridge.
Black olives, chopped in half.
A clove or two of garlic.
Crumbled feta cheese.
Halved cherry tomatoes.
Any fresh herbs around, especially basil or parsley.
Grilled vegetables such as eggplant, zucchini, capsicum or mushrooms. Not really feasible in your situation but you could get antipasto from the deli or supermarket instead. Caramelised onion is also nice but not likely for you. Half a fresh salad onion would probably be nice.
Baked potato is also possible in the microwave but not as good as the oven. I top with beans, cottage cheese, cheddar or stilton, depending on what's around.
Oat porridge is also good made in the microwave. I mix in sultanas and peanut butter or chopped apple and cinnamon.