4 ounces pepperoni
1 cup finely chopped onion
1/2 cup finely chopped green bell pepper
2 cloves garlic, minced plus 1 whole clove
1/2 teaspoon dried oregano
Kosher salt and freshly ground black pepper
1 tablespoon tomato paste
One 28-ounce can crushed tomatoes
1/3 cup pitted black olives, chopped
1/4 cup grated Parmesan
1 baguette, ends trimmed, sliced diagonally into twenty-four 1/2-inch pieces
2 tablespoons olive oil
4 ounces mozzarella, diced