01 - Set oven rack in center position and preheat oven to 400°F.
02 - Arrange mini bagel halves, cut side up, on a baking sheet.
03 - Spread each bagel half evenly with approximately 2 teaspoons marinara sauce.
04 - Sprinkle about 1 tablespoon shredded mozzarella onto each bagel half.
05 - Place 2 slices of pepperoni on each bagel half.
06 - Bake in preheated oven for 10 minutes, or until cheese is melted and bagels are golden.
07 - Cool briefly, then serve warm.