Best Meatballs Al Forno Recipe

Ingredients

• 1 cup whole milk or ricotta
• ½ cup dried breadcrumbs
• 1 medium onion, peel removed and grated
• 1 large egg, beaten
• 3 cloves garlic, minced
• ½ cup finely chopped parsley, plus more for garnish
• 1 cup grated Parmesan
• 1 lb medium ground beef
• 8 oz Italian sausage, casings removed (about 2 sausages)
• 1 ½ tsp kosher salt
• ½ tsp black pepper
• 28 oz can whole peeled tomatoes, crushed
• 3 garlic cloves, thinly sliced
• ¼ tsp salt
• ⅛ tsp red pepper flakes
• 1 sprig oregano
• 1 cup grated mozzarella cheese
• ½ cup grated Parmesan cheese, plus more for serving
• Fresh parsley or basil, chopped, to garnish
• Crusty bread or garlic bread, to serve