Add all of the ingredients to a baking dish, with the exception of the crust ingredients, and stir to combine.
To make the topping, whisk together all of the dry ingredients in a medium mixing bowl.
Add the wet ingredients to the dry ingredients.
Whisk ingredients together until a dough forms.
Sprinkle flour on a piece of parchment paper and turn out dough. Roll it to 1/4 inch thickness and then transfer to the top of the chicken mixture in the baking dish.
Place in the oven and bake for 30 minutes, covered with a piece of aluminum foil, then 10 minutes without a covering.