01 -
Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper or apply a light coating of oil.
02 -
In a large skillet over medium heat, cook ground beef, breaking it into crumbles, until fully browned.
03 -
Add chopped onion and green bell pepper to the beef. Continue to cook, stirring frequently, until vegetables are softened.
04 -
Stir in pizza sauce, Italian seasoning, and mini pepperoni slices. Simmer mixture for 3-5 minutes until heated through.
05 -
Arrange bottom halves of hamburger buns on prepared baking sheet. Spoon meat mixture evenly onto each bun. Sprinkle shredded mozzarella cheese over filling.
06 -
Transfer baking sheet to oven and bake for 10 to 15 minutes, or until cheese is fully melted and bubbly.
07 -
Remove from oven. Top each with remaining bun half. Serve immediately while hot.