Gather all ingredients before starting recipe

Pre heat oven to 375°

Slice 3 hamburger buns in half

Slice meat balls in half and top each bun with 3 pieces and top with a large dollop of red sauce

Top last bun with sliced left over chicken, top with red sauce

Place buns with tomato sauce and the tops of the buns on a sheet pan

Cover sheet pan with aluminum foil and place in a pre heated oven for 12 minutes

Remove sheet pan, uncover, mound each bun with tomato mixture with a generous amount of grated mozzarella cheese and turn the bun tops over. Place under broiler until the buns are nicely toasted and the cheese has melted and is bubbly