added and left to melt, it it such a delicious cheese sauce!
i have made this several times and my family loves it! and we are not even casserole eaters;-). i bake the chicken first after brushing w olive oil and sprinkling w salt & pepper then cube it. i save the juices and use it for my broth in the recipe. i do add more s & p to sauce before pouring over chicken and broccoli. ( just add to taste).
for the person who said the sauce never got thick, it could be your medium heat was not high enough to bring the sauce to a boil, a low one 