I don't cook, and I definitely always clean my plate at restaurants so I guess none - in all seriousness, when I lived alone, my refrigerator often only consisted of a single carton of eggs and nothing more. I hated cooking at the height of COVID lockdowns and am not good at it due to my OCD - cooking a chicken breast took over 3 hours with all of the cleaning I had to do in the kitchen throughout the process to "avoid salmonella." Going out to eat, ordering a single item, and not having any leftovers has been a much better and more fun system for me.