"Modify the existing chicken stew pot pie recipe to be extra creamy and adapted for a 9 x 12 Pyrex baking dish. Keep it family-friendly for 3 adults and 1 four-year-old, using leftover chicken stew with black beans, chili beans, corn, bell peppers, mixed vegetables, mushrooms, onion, and two pie crusts. Make the filling thicker and creamier, suitable for a casserole-style pot pie in a rectangular dish. Use imperial units. Also make it more classic pot pie style, meaning a creamy savory filling with vegetables and chicken under a flaky crust, but still based on the user's leftovers."