In A 1 1/2 Quart Casserole Dish, Microwave Cook Onion And 2 Tb. Butter, Uncovered For 1 Minute. Add Potatoes. Cook, Covered For 4 To 6 Minutes. Beat Together Eggs, Milk, And 1/4 Tsp Pepper. Stir In Ham. Pour Over Potatoes. Cook On High For 4 To 5 Minutes. Push Cooked Portion To Center After 1 1/2 Minutes, Then Every 30 Seconds After. Let Stand 1 Minute After Cooking To Let Egg Set Completely.