Macaroni and Cheese with Kielbasa

This is not your blue box mac and cheese

In a sauce pan melt 3T butter and add 1/4C flour, still until bubbley; Add 2C milk and stir until thickened. The mixture will not reach its maximum thickness until it reaches the boil. Add 1T prepared mustard and 8oz. of sharp chedder cheese. Sometimes we subsitiute 2oz. of of the chedder with another cheese such as blue cheese or goat cheese. Cook the elbows until barely tender so that they will finish cooking in the sauce. Mix the sauce with the macaroni, sprinkle on 1/4C of breadcrumbs, drizzle with olive oil, place in a baking dish and bake, covered, at 350 degrees for 30 min. Remove the cover and place under the broiler to brown the breadcrumb topping.
We like to serve this with a piece of kielbasa.