Pat LaFrieda's Four-Meat Meatloaf Recipe

Ingredients

• 2 tablespoons extra virgin olive oil
• 2 cups yellow onion (about 2 medium)
• 4 cloves garlic
• 1 1/2 cups shredded mozzarella cheese (about 6 ounces
• 1 cup Pecorino Romano cheese
• 2 tablespoons fresh flat-leaf parsley leaves
• 1 pound chopped ground beef
• 1 pound chopped ground pork
• 1 pound chopped ground lamb
• 1 pound chopped ground veal
• 1/2 cup Italian-style bread crumbs
• 4 teaspoons kosher salt
• 2 teaspoons freshly ground black pepper
• 4 large eggs
• 2 teaspoons paprika
• 3/4 cup tomato sauce