1. Heat skillet over medium heat. Whip eggs, chives and milk in bowl and set aside. Melt half of the butter in the pan, and pour half of the egg mixture in the pan. When egg is slightly set, add half of tomatoes, cheese, and salt and pepper. Cook for about two minutes, or until egg mixture is cooked through. Tilt pan over serving plate, folding omelet in half on the plate.
2. Repeat for second omelet.
Makes 2 omelets