Mustard cheese sauce is a creamy and tangy sauce made with a combination of mustard and cheese. It is a versatile sauce that can be used as a dip, a topping for burgers or sandwiches, or as a sauce for pasta or vegetables. The mustard adds a zesty kick to the sauce, while the cheese adds a rich and creamy texture. This sauce is easy to make and can be customized by using different types of cheese or adding additional spices or herbs.