Preheat oven to 400°F. Boil gnocchi according to package directions.
Spread in single layer on baking sheet; let cool.
Whisk together egg, 1 tbsp water, Worcestershire sauce, bread crumbs, garlic, herb mixture, salt and pepper. Crumble in ground beef; mix together until well combined. Form into 16 meatballs.
Make indentation in each meatball. Insert one gnocchi and one cube of mozzarella; reform meatball around gnocchi and cheese.
Bake on foil-lined baking sheet for about 15 minutes or until golden, cooked through and cheese is melted.
In saucepan, warm marinara sauce over medium heat. Serve meatballs with sauce for dipping.
Recipe Notes
Tips:
Add 1 tbsp. chopped fresh parsley to meatball mixture if desired.
Serve meatballs on festive toothpicks as party appetizers.