Try this homemade Tuna Casserole recipe the whole family will love. Made with spaghetti, tuna, bell pepper and onion. Easy step-by-step instructions inc…
This Tuna Casserole relies on simple, everyday ingredients such as (8 oz.) pkg. spaghetti, (6 oz.) cans tuna, chopped bell pepper and small onion. It comes together quickly and makes 4 servings, at about 513 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