Cooking just for yourself and don't want to eat the same thing all week? Recipes for one are built around a single serving — quick meals, one-pot dishes, and bowls with no waste and no leftover mountain. You cook just enough for you and use up what's in the fridge. Pick what you'll make today.
Quick answer
Stick to recipes written for a single serving and buy ingredients you'll actually get through — eggs, canned beans, frozen veg. Fold any leftover fresh ingredients straight into the next meal so they don't end up in the bin.
Quick one-pan or one-pot dishes: an omelette, fried rice, pasta, a bowl, or soup. They're ready in minutes, leave one pot to wash, and don't saddle you with three days of the same batch.
For pan and pot dishes, just divide the ingredients by four and season to taste — expect a shorter cooking time and liquids reducing faster in a small batch. Baking doesn't scale down that easily, so there you're better off finding a recipe written for one from the start.
Cooking for one means leaning on the freezer: bread, meat, and portions of cooked meals all freeze for later. Toss veg you won't use right away into a soup, sauce, or pan so nothing wilts.
A single portion costs a bit more than family-scale cooking, but still far less than delivery. Keep a base of staples — rice, pasta, canned beans — and buy fresh ingredients only for the recipe at hand, loose rather than pre-packed where you can.