Preheat oven to 400°F.
Pour 2 cups bread crumbs into a bowl. In a separate bowl combine 2 eggs, 1 egg yolk, milk and flour. Whisk until smooth and set aside.
In a small bowl, combine ½ cup bread crumbs, hot sauce, celery, onion and the reserved egg white. Add ground chicken and mix just until combined.
Divide into 18 equal pieces roll into balls. Roll each ball in the Panko crumbs, dip into the egg mixture and roll in the Panko crumbs again. Place on a rack and bake 25 minutes.
Open the Cobblestone Bread Co. White Grinder Sub Rolls and spread butter on each. Sprinkle with parsley and garlic powder. Broil about 3-4 minutes or just until lightly toasted.
Place fresh coleslaw on each roll.
Toss meatballs, a few at a time, in heated buffalo sauce. Place 3 meatballs on each White Grinder Sub Roll and drizzle with dressing. Garnish with a sandwich pick.
