There are many different types of white sauces that can be used in French, Italian, and Greek cuisine. Some popular substitutes include: For a French béchamel sauce, try using a roux made with flour and butter. This will give your sauce a thick, creamy consistency. For an Italian béchamel sauce, try using a simple tomato sauce or a light cream sauce. These sauces will add flavor to your dish without overshadowing the other flavors in the dish. For a Greek béchamel sauce, try using a light olive oil or lemon-based sauce. These sauces will add a refreshing flavor to your dish.