01 -
Mix panko bread crumbs with milk and let set for 5 minutes.
02 -
Mix the soaked panko, grated Parmesan cheese, ground chicken, egg, minced garlic, onion powder, dried parsley, Kosher salt, and lemon pepper seasoning in a bowl until evenly combined. Do not overmix.
03 -
Shape the mixture into golf ball-sized meatballs and place them in a single layer in the slow cooker (about 8 meatballs).
04 -
Cook on high for 4 hours or on low for 8 hours.
05 -
In the last hour of cooking, pour the tomato basil pasta sauce over the meatballs. Top each meatball with a slice of fresh mozzarella and a sprinkle of shredded Parmesan cheese. Cook on high until the cheese melts and the dish is heated through.