Try this homemade Meatball Sub Sandwich Casserole recipe the whole family will love. Made with onion, breadcrumbs, parmesan cheese and ground beef. Easy…
This Meatball Sub Sandwich Casserole relies on simple, everyday ingredients such as chopped onion, parmesan cheese, grated, mayonnaise (no substitutes) and salt & pepper. It comes together quickly and makes 4 servings, at about 963 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