Cut low-moisture mozzarella cheese into 3/4 inch cubes. Store in refrigerator while preparing the meat.

In a large mixing bowl combine: 
* 1 pound ground beef
* 1 pound hot Italian sausage
* 1/2 tsp garlic powder
* 2 tsp salt
* 1 tsp black pepper
* 1 cup bread crumbs
* 1/4 cup parmesan cheese
* 2 eggs
* 1/2 cup whole milk
* 1/2 cup chopped parsley

Directions:
Roll golf-ball-sized balls with the meat mixture. Squish mozzarella cube into the center and pull the edges of the meatball around it until it’s a new ball again. Arrange meatballs in slow cooker and cover in tomato sauce. Cook on high for 2 to 2½ hours.