when i lived alone, i used to cook for myself a lot. it was pretty much how i learned to cook. since i didn't have to worry about anyone else eating my creations, i experimented often, learning thru mistakes along the way.
like breezy and grumble mentioned, a marinated (evoo, chopped garlic) broiled steak, a nuked potato, and a can of peas was a good meal. also, fish filets cooked in a foil pouch with butter, lemon, and herbs was easy and tasty, and cleanup was easy.
a ham "steak", put into a skillet with just enough water to cover, and brought to a simmer is another quick and easy meal, served with a side of rice and steamed veggies.
stuff a whole small fish, such as trout or red snapper, with sliced veggies, herbs, and evoo. rub the skin with evoo, bake at 350 for 20 minutes, or until cooked thru and the meat flakes away from the bones.
one of my all time faves is veal and peppers. just cut up a veal shoulder chop into large chunks, brown in evoo, and add to a pot with a large can of crushed tomatoes. brown some onion and garlic; slice green peppers into strips, add to pot. simmer on very low for about 2 hours.
you could make this as chicken cacciatore instead by substituting chicken legs and thighs (cut in half) for the veal, and add a large handful f sliced mushrooms.
hope this helps.