Mix Eggs, Soup, Milk And Black Pepper. Heat Butter In Large Ovenproof Nonstick Skillet Over Medium Heat. Add Mushrooms, Onion And Zucchini And Cook Until Tender. Add Soup Mixture. Cook Over Medium-Low Heat 8 Minutes Or Until Eggs Are Set But Still Moist. Sprinkle Cheese Over Egg Mixture. Broil 4" From Heat 2 Minutes Or Until Golden Brown. Sprinkle With Green Onion. Cut Into Wedges.