Nov 25, 2021 · The ham or cheese you use is up to you and can be varied to your liking. Making an omelet is a great way to use leftover ham or gammon, switching the flavors between smoked or unsmoked. With the cheese, choose a good melting cheese; cheddar is probably one of the best but try a grated Gruyere with its strong flavor, or a softer cheese like a ... I did maybe a third to a half cup of milk maybe 1 oz. more cheese and a little more of the cornstarch and water made a little more sauce a little wetter than the first batch poured it over the casserole had left over small amount of Monterey jack (no bread crumbson hand) sprinkled it intermittently on the casserole covered lightly with aluminum ... Melt remaining 1/4 cup butter in a clean skillet; cook and stir flour in melted butter until smooth, about 3 minutes. Gradually stir in milk and season with salt and black pepper. Bring to a boil, stirring constantly, until thickened, about 2 minutes. Add Cheddar cheese; stir until melted. Pour cheese mixture over ham and potatoes.