My Friend Joyce's "Bathtub Casserole"

Cook ground beef and next 3 ingredients in a large skillet over medium heat, stirring, until meat browns and crumbles. Drain well; set aside.

Combine chopped pepperoni and next 5 ingredients in a large bowl; stir in meat mixture and cooked pasta shells.

Spoon half of mixture into 2 lightly greased 11 x 7 x 1 1/2-inch baking dishes.

Sprinkle with half of Parmesan and Mozzarella cheeses.

Top with remaining pasta mixture.

Bake at 350° for 30 minutes or until heated; top with remaining cheeses. Bake 5 additional minutes.