Spread One Side Of Each Slice Of Bread With Margarine, And Place A Bread Slice, Margarine-Side Down, Into A Nonstick Skillet Over Medium Heat. Place A Slice Of Swiss Cheese, The Cooked Chicken Breast, A Layer Of Barbecue Sauce, The Ham Slices, And The Remaining Swiss Cheese Slice Onto The Bread Slice In The Skillet. Top The Sandwich With The Other Bread Slice, Margarine-Side Up. Gently Fry The Sandwich, Flipping Once, Until The Cheese Is Melted And Gooey, And The Bread Is Golden Brown On Both Sides, About 5 Minutes Per Side.