1 (8 ounce) package mozzarella cheese, sliced
2 (6 ounce) cans Italian-style hot tomato soup
1 cup chopped tomatoes
1/2 cup chopped onion
1 (12 ounce) package shredded mozzarella cheese
1/2 cup grated Parmesan cheese
Place sliced cheese slices, tomato soup, tomatoes, onion and mozzarella cheese in shallow dish and flatten with a fork. Cover and refrigerate until pizza is ready.
Preheat grill for high heat and lightly oil grate.
Cook pizzas using remaining mozzarella cheese slices. Grill approximately 10 minutes on each side. Serve immediately on pizza slices.