If you cook—when you cook—you generate as many dishes cooking for one as you do cooking for two. I am learning that this week, with Steve out west in British Columbia, skiing. You still have the chef's knife, the pot, the colander, the lid. You don't economize on cookware. You don't economize on compost. You still have to make the investment in making the meal.
You do have only half the service, but that's nothing, really. You still have to run the dishwasher.