Mix together panko bread crumbs and milk and let sit for 5 minutes
Add the softened breadcrumbs to the chicken, egg, seasoning and parsley in a large bowl
Use hands to mix together well
Form into 12 equal sized meatballs
Place in slow cooker
Add broth and beer
Cover and cook on low for 6-8 hours or high for 3-4
Remove meatballs and strain liquid into a saucepan
Whisk together cornstarch and water and add to broth in saucepan
Bring to a low boil over medium high heat, reduce heat as it thickens for about 5-7 minutes
Add 1 tablespoon of cream for a creamier sauce if desired
Season with salt and pepper to taste
Serve sauce with meatballs