I started it the first day with some vegetarian rice or pasta concoction on the stove, served some, put the pan in the fridge, took it out the next day, added some ingredient (usually by sniffing it, and imagining what flavor would be good to add), cooked on stove again, repeat.
It usually ran out in about a week. It tended to taste better closer to the end of its lifecycle, but this was irreproducible -- I didn't keep notes, nor plan, because this was improvisational art, not engineering/science.
One day, I was telling a new roommate about my lazy improvisational cooking, and she mentioned her grandmother died from "that", so I stopped. Even if there wasn't a bad association, I'd have to learn about food safety, to be coloring outside the lines like that, which would be too much like work.