Mix potatoes, chicken, kale, cheese and dried onions in a big bowl.
In a small saucepan melt the butter and mix in the rest of the sauce ingredients
Drizzle butter mix over potato mix and toss to coat well
Divide between 2 -9x13 or 3- 8x8 greased pans
To freeze, cover with foil, write date and freeze instructions and pop into the freezer
To cook- use fresh or thaw, cover a 9x13 pan with 3 cups of milk or an 8x8 with 2 cups of milk.
Bake at 375F for 45-60 minutes, OR until browned and bubbly
For an extra crisp crust, broil for 3-5 minutes, but be sure to set a timer for only 2-3 minutes and check!