LAYER ham, broccoli, cheese and dry stuffing mix in 13x9-inch baking dish sprayed with cooking spray.
WHISK remaining ingredients until blended; pour over stuffing. Refrigerate 30 min.
HEAT oven to 375°F. Bake casserole, uncovered, 1 hour or until centre is set. Let stand 10 min. before serving.
serving size = 1/8 recipe (256 g)