I'll roast a fryer in my toaster oven. After making a meal or 2 of part of it, I might make sandwiches. Then the entire carcass becomes the base for chicken soup, providing several more meals.
A pound of ground turkey, combined with various on-hand vegetables (onion, garlic, broccoli stalks, celery, carrots, etc) makes a good stir-fry or stew, to be served with or over rice.
A large package of pork chops might be combined with sliced potatoes, onion and a can of cream of mushroom soup to make smothered pork chops.
Etc.
Each of these overly large dishes makes several meals for a single person, but is often even better when warmed up as leftovers. Same for pasta.