Preheat oven to 400 degrees F. Adjust oven rack to top third of oven. Line baking sheet with parchment paper. Set aside.
Slice bagels in half. Spread marinara sauce on cut side of bagel. Sprinkle mozzarella cheese on top. Arrange pepperoni and pancetta on top of cheese. Sprinkle lightly with oregano and black pepper. Add a little more cheese on top. Place on prepared parchment paper. Repeat with remaining bagels.
Bake in preheated oven for 10-15 minutes or until cheese has melted.