Preheat oven to 375°F. Spray a muffin pan with cooking spray. Line each muffin cup with two wonton wrappers each.
Add 1 tsp pizza sauce to each wonton cup. Top with 1 to 2 tsp of mozzarella cheese, pepperoni slices and green peppers. Sprinkle a pinch of Italian seasoning on top.
Bake for 15 minutes or until cheese is melted and wontons are golden brown. Serve hot.