Try this homemade Easy Overnight Tuna Casserole recipe the whole family will love. Made with rotini, mixed vegetables, cream of celery soup and Cheddar …
This Easy Overnight Tuna Casserole relies on simple, everyday ingredients such as uncooked rainbow rotini, frozen mixed vegetables, skim milk and margarine, melted. It comes together quickly and makes 4 servings, at about 204 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026