1Steam Cauliflower till just fork tender--Do not over cook. in the mean time start your cheese sauce. melt butter in pan add flour stirring all the time with a whisk. Add milk and and continue to whisk it till it is slightly thick, Add salt and Pepper to your taste, Temper egg yolks with a little of the sauce and then add to the mixture. Mix well. Add cheese and keep mixing till you have a nice cheese sauce then remove from heat. Beat egg whites until stiff and then fold into the cheese sauce. After cauliflower is fork tender place in a sprayed casserole bowl now pour cheese sauce over and mix well. You might want to do this in another bowl first less messy that way and then add it to your casserole . sprinkle top with bread crumbs and bake in 400 oven 30-35 min.