05Roast 5-10 minutes.06Remove from oven, sprinkle with salt, cut into bite-size pieces, and let cool.07Reduce oven to 400°F.08In a large pot, melt butter over medium heat.09Add flour and stir for about 2-3 minutes.10Combine water and broth; slowly add to flour-butter mixture, constantly stirring.11Cook about 5 minutes.12Add mozzarella and lemon zest, stirring until the mixture is smooth.13Butter a 13 x 9 baking pan.14Place a layer of noodles in the pan, then half the sauce, then half the asparagus pieces, then 1/2 cup parmesan.15Repeat, then put on the top layer of noodles.16In a small bowl combine cream and a dash of salt.17Whip until soft peaks form then spoon over noodles.18Sprinkle with remaining 2/3 cup parmesan cheese.19Bake 30 minutes.