01 -
In a bowl, combine ground beef, breadcrumbs, Parmesan cheese, egg, onion, garlic powder, salt, and pepper.
02 -
Form the mixture into meatballs.
03 -
Place the meatballs in the crockpot.
04 -
In a separate bowl, mix beef broth and French onion soup mix, then pour over the meatballs.
05 -
Cover and cook on low for 6-8 hours or high for 3-4 hours.
06 -
Top with mozzarella cheese and cook for an additional 15 minutes until melted.