1 bagel, sliced in half
½ cup tomato sauce
¼ cup shredded mozzarella cheese
1 small onion, sliced into rings
1 green bell pepper, chopped
1 (8 ounce) package sliced pepperoni sausage
Spread bottom bagel half with tomato sauce; add cheese, onion, bell pepper and pepperoni. Place other half of bagel on top.
Preheat toaster oven to 425 degrees F (220 degrees C).
Place bagel in preheated toaster oven and toast about 10 minutes, or until bagel is golden brown.