Spoon the potato mixture into a 1 1/2-quart baking dish. Bake at 350°F. for 30 minutes or until the potato mixture is hot. Tip: To make 3 cups mashed potatoes, place 2 pounds potatoes ...
Mix the cornflour and water and stir into the casserole. Add the leeks and stir well. Top the chicken mixture with the potato dumplings, overlapping them slightly, so they almost cover the filling.