Italian Mozzarella-Stuffed Meatloaf

Ingredients (11)

• + 1 ½ pounds ground beef add to pantry
• + 1 medium onion, chopped add to pantry
• + 1 (8 ounce) can tomato sauce, divided add to pantry
• + ½ cup bread crumbs add to pantry
• + 1 egg add to pantry
• ✓ 2 cloves garlic, minced
• ✓ 1 teaspoon dried oregano, divided
• + 1 teaspoon salt add to pantry
• ✓ ⅛ teaspoon ground black pepper
• + 1 ½ cups shredded mozzarella cheese add to pantry
• + 2 tablespoons grated Parmesan cheese add to pantry