Step 1

In a large bowl, combine 2 tablespoons tomato sauce, egg, bread crumbs, onion and salt. Crumble beef over mixture and mix well. Shape into 1-in. balls.

Step 2

Place meatballs on a greased rack in a shallow baking pan and bake at 375° for 15-20 minutes or until meatballs are no longer pink; drain.

Step 3

Meanwhile, in a large skillet, combine remaining tomato sauce with vegetables and seasonings. Cover and simmer 10-15 minutes or until heated through; stir in meatballs and set aside.

Step 4

Place potatoes in a greased 11x7-in. baking dish. Brush with butter and bake at 375° for 15-20 minutes or until lightly browned. Remove from the oven; top with meatball mixture. Arrange cheese strips in a lattice pattern on top. Bake, uncovered, for 20-25 minutes longer or until heated through and cheese is melted.