1. Whip eggs with half and half, chives, salt, and pepper.
2. Melt butter over high heat in a 10 inch nonstick skillet which has been coated with cooking spray.
3. Heat until bubbly, but watch closely, do not burn.
4. Pour egg mixture into skillet, pulling them toward the center from all sices.
5. Remove from heat when the eggs not longer run, but are still moist.
6. Add cheeses to half of omelet, fold the other half over the top of the cheese and slide onto plate.
7. Let rest for 1 minute before serving.