MIX ham, broccoli, cheese and croutons; place in 13x9-inch baking dish.
BEAT eggs and milk in medium bowl with wire whisk until well blended. Add dressing, flour and seasonings; mix well. Pour over ham mixture; cover. Refrigerate at least 1 hour or overnight.
PREHEAT oven to 375°F. Bake, uncovered, 45 minutes or until center is set.