To make croutons: Preheat oven to 400 degrees. Cut 2 hero rolls (each 3 ounces) into 3/4-inch cubes; scatter on a rimmed baking sheet. Toss with 2 tablespoons olive oil and 1 teaspoon dried oregano; season with coarse salt and ground pepper. Bake until golden, 6 to 8 minutes. Let cool before using.