Try this homemade Thanksgiving Leftover Casserole recipe the whole family will love. Made with peas, noodles, onion soup mix and mushroom soup mix. Easy…
This Thanksgiving Leftover Casserole relies on simple, everyday ingredients such as onion soup mix (dried type), mushroom soup and gravy. It comes together quickly and makes 4 servings, at about 324 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.
Updated Jun 30, 2026