I read a recipe a bit ago that was pretty decent. It's a variant of chicken cordon bleu. Chunk up the cooked chicken, layer with deli-sliced swiss cheese; deli-sliced ham. I forget what bit of liquid, bread crumbs over the top and bake in the oven for maybe 30 minutes to melt all the cheese and thicken the liquid. I'm sure if you google chicken cordon bleu casserole, you'll find something.