Cheesy French Onion Meatballs Rich, cheesy, and full of caramelized onion flavor, these French Onion Meatballs turn a classic soup into a cozy one-pan dinner. Ingredients For the meatballs 1 lb ground beef 1/2 cup breadcrumbs 1 egg 2 garlic cloves, minced 1 tablespoon Worcestershire sauce 1 teaspoon Italian seasoning 1/2 teaspoon salt 1/2 teaspoon black pepper For the onion gravy 2 large yellow onions, thinly sliced 3 tablespoons butter 1 tablespoon olive oil 2 garlic cloves, minced 1 tablespoon