Mom's Macaroni & Cheese

With the weather getting colder and colder.  I'm finding myself calling my Mom more and more for her comfort food recipes.  A few weeks ago I got her macaroni and cheese recipe and made the above adding fusilli pasta to it.  But I think what makes this recipe so good is that my Mom adds finely chopped onion to it!  Once the macaroni and cheese is in the oven baking the aroma is amazing!