Pepperoni Pizza Sliders

INGREDIENTS

12-count package Hawaiian sweet rolls, sliced in half (see directions for more details)

1 cup

pizza or marinara sauce

about 2 1/2 cups shredded mozzarella cheese, divided

1 5 ounce package

mini pepperoni (regular size may be substituted)

1/2 cup

unsalted butter, melted

2 tbsp

dried minced onion

to 2 tablespoons freshly grated Parmesan cheese, plus more for garnishing to taste

2 tsp

dried oregano

3/4 tsp

garlic powder, or to taste

1/2 tsp

kosher salt, or to taste

1/4 tsp

freshly ground black pepper, or to taste

1 tbsp

finely chopped fresh Italian flat-leaf or regular parsley, optional for garnishing