I had picked asparagus from my garden today, and we had leftover ham, so this pasta dish was a perfect quick dinner! I have a favorite lemon sauce that is loaded with butter and cream, and this lighter version was quicker just as tasty. I added some of the pasta water and a bit of chicken broth to the sauteed onion and garlic and simmered to reduce it before adding the milk-flour mixture. I believe that added flavor and substance to the sauce. Because the ham was salty I left out the mustard.