Preheat your oven to 375°F.
This ensures an even and thorough cooking of the casserole.
In a large bowl, combine the cooked chicken, both soups, milk, and peas.
Stir until everything is well mixed.
Grease a 9 x 13-inch baking dish and pour in the chicken mixture.
Levels it with a spatula to ensure an even layer.
In a separate bowl, mix the stuffing with the melted butter and vegetable broth.
Sprinkle it evenly over the chicken mixture in the baking dish.
Bake in the preheated oven for 25-30 minutes.
The casserole should be bubbling, with the stuffing topping golden brown.