This is a lovely reinvention of the macaroni and cheese that my mom made when I was growing up. With leeks, too.
Beverage pairing: Marco Porello Roero Arneis Camestrì, Italy. All the rich, savory and sweet flavors here suggest a wine that will contrast and leaven the experience; something light, acidic and maybe even a little tart. There are several such wines made in the north of Italy, but Arneis is a good choice. It has the necessary acidity and sharpness to cut through all the cheese, while adding some herbal and floral notes of its own. This particular wine has just enough richness to hang with the macaroni.