20+ years ago I worked at a food store frequented by urban poor including some homeless and as a starving student at that time I fit right in.
At that level "cooking" is buy a bun (or two) from the bakery for 50 cents (or less if day old), a dollars worth of sliced meat from the deli, a slice or two of deli cheese for a quarter, grab a handful of condiment packets from the deli, and "cook" that into a sandwich lunch for about two bucks while laughing at the $7 premade subs from the deli or the fast food joint. And frankly the ingredients are probably higher quality than the fast food restaurant.
At that level "cooking" is buy a bun (or two) from the bakery for 50 cents (or less if day old), a dollars worth of sliced meat from the deli, a slice or two of deli cheese for a quarter, grab a handful of condiment packets from the deli, and "cook" that into a sandwich lunch for about two bucks while laughing at the $7 premade subs from the deli or the fast food joint. And frankly the ingredients are probably higher quality than the fast food restaurant.