I enjoy cooking and I enjoy my alone time and I agree that cooking for one is tough.
You can cook for 2-4 people and use the leftovers for lunch or dinner another night.
Usually when I will be alone for some time I get good deli meats, some nice cheeses and some really good bread and crackers. One of my favorite meals is an assortment of sliced meats with different cheeses and some tasty bread. I can eat what I want and save some for future meals.
You can also spend one night cooking several different cuts of meat for future meals. Each night get out a different cut of your cooked meat and make sides for just that night.
Spending time each day cooking a meal for just one seems like a waste of time and very inefficient.
We hit this with cooking for two on a calorie focused diet. We tend to put half directly in pyrex and store for the next day. You could do the same, but freeze them. Cook for 3 days and eat for 12. You may want to mix up the sides that go with things.
I have a steamer that I can cook 4 boneless chicken breasts in, in about 15 mins. That usually lasts as my lunch almost all week. To compliment that I microwave mixed veggies and beans. Then eat a salad with it.
I make egg whites and microwave mixed veggies for breakfast.
(Both of these things are Tim Ferriss/4-Hour Chef inspired)
Easy meal if you have a rice cooker. If you are near a Ikea the children's pots and pans are stainless steel. I use the small strainer as a lift for a ceramic plate. I put rice in the bottom and a fish on the plate. The pedestal lets the rice fluff up and when the rice is done so is the fish.
I'll put that in and clean the kitchen until the cooker goes bing.
Easy simple and for one.
When I lived alone in Indiana, I used to make spaghetti all the time. You can do all sorts of things with spaghetti, different flavorings and styles you can change it up however you like, and it is a cheap meal.