Crockpot French Onion Meatballs – TartAmour

Ingredients

• 1 pound ground beef
• 1/2 cup seasoned bread crumbs
• 1/4 cup grated Parmesan cheese
• 1 egg
• 2 cloves garlic, minced
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 2 tablespoons olive oil
• 2 cups beef broth
• 2 large onions, thinly sliced
• 2 tablespoons butter
• 1 tablespoon Worcestershire sauce
• 1 teaspoon thyme
• 1 cup shredded Gruyere or Swiss cheese