Because stay at home moms usually don't get to stay at home, we had pancakes last night. Now, what do I serve on Friday?
Anyway, to answer your question, you could make stir-fry meals using enough ingredients for one (or two) servings. You'll have to read some recipes for the sauces and adjust them for smaller portions, which shouldn't be hard. Do you know that you can cook the whole box of rice, eat what you want, and freeze the rest in portioned bags? It cooks in the same time it takes to cook a little bit.
Try buying the bags of frozen chicken breast halves. One or two will defrost in the microwave in a few minutes, and are easier to cut or slice if still a little frozen. You can prepare/chop fresh vegetables and package them in meal-sized portions, or cheat and buy them from the grocery salad bar.
We watch 30 Minute Meals on Food TV. Those recipes seem to be good for one or two people. Check her place at foodtv.com for recipes.