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.