In a small bowl, whisk eggs; set aside. In an 8-in. ovenproof skillet, saute the onion, pepper and mushrooms in oil until tender. Reduce heat; sprinkle with crab. Top with eggs. Cover and cook for 5-7 minutes or until nearly set. Uncover skillet; sprinkle with cheese. Broil 3-4 in. from the heat for 2-3 minutes or until eggs are completely set. Let stand for 5 minutes. Cut into wedges.