Heat oven to 375°F. Line 15x10x1-inch pan with foil; spray foil with cooking spray. In large bowl, mix bread crumbs and 3 tablespoons of the pasta sauce. Stir in beef, onion, salt, oregano and egg. Shape mixture into 18 (2-inch) balls. Press 1 cheese cube into center of each ball, sealing it inside. Gently place in pan. Bake 10 minutes.