Instructions

• Heat 2 tablespoons olive oil in a large skillet over medium heat.
• In a large bowl, combine 1/4 cup finely diced onion, 1 grated garlic clove, salt and pepper to taste, and 1/2 pound ground beef. Mix until just combined, then form the mixture into small meatballs.
• Add the meatballs to the hot skillet in a single layer (work in batches if needed). Cook, turning as needed, until browned on all sides (about 2 minutes per side).
• Reduce the heat to low or medium-low. Pour in 1 1/2 cups pizza sauce and, if your sauce is thick, add up to 1/2 cup water to reach your desired consistency. Gently stir so the meatballs are coated in sauce.
• Cover the skillet and simmer until the meatballs are cooked through (no pink in the center) and the sauce is heated through, adjusting heat as needed to maintain a gentle simmer.
• Meanwhile, preheat the oven broiler to high.
• Open the 4 rolls. Divide the meatballs and sauce among the rolls (about 4–5 meatballs per roll). Top each with 1/4 cup grated mozzarella cheese and 4 slices of pepperoni.
• Place the assembled sandwiches under the broiler until the cheese is melted and the pepperoni is sizzling, watching closely to prevent burning.
• Remove from the oven and serve hot.