Place the egg whites into a large mixing bowl. Beat at high speed until soft peaks form.

In smaller bowl place the egg yolks, and using same beaters, beat yolks, mayonnaise and 2 tablespoons water. Gently pour yolk mixture over whites and fold in carefully.

Melt butter in 9-inch pie plate and swirl to coat inside. Carefully pour eggs into pie plate. Microwave at medium (half power) for 5 to 7 minutes. Sprinkle the shredded cheese over eggs and microwave at medium for 30 seconds to 1 minute.

Sprinkle with chopped chives olives, then quickly run a spatula around sides and bottom of dish. Fold half of omelet over the other half. Slide onto serving plate. Serving Ideas : Serve with a spicy tomato sauce or salsa.