Prepare The Stuffing: In a saucepan, bring chicken stock and unsalted butter to a boil. Add the stuffing mix, stir well, and cover. Remove from heat and let stand for 5 minutes. Fluff with a fork before using.
Bake And Serve: Bake the casserole uncovered in the preheated oven for 30 minutes, or until it’s hot and bubbly and the top is crispy. You can place it under the broiler for a couple of minutes to crisp up the top if needed.