In A 10-In. Ovenproof Skillet, Saute The Onions In Oil Until Tender. Add The Zucchini, Cauliflower And Eggs. Cover And Cook Over Medium Heat For 10-15 Minutes Or Until Eggs Are Nearly Set. Arrange Pepperoni Over Eggs. Broil 6 In. From The Heat For 2 Minutes. Sprinkle With Parmesan Cheese; Broil 1-2 Minutes Longer Or Until Eggs Are Completely Set And Top Is Lightly Browned. Cut Into Wedges.