1)Melt butter over medium-high heat in a nonstick skillet.  This recipe works best in a nonstick skillet, you might need more butter for a skillet that is not non-stick

2)Crack 2 eggs in a bowl and whisk with a fork until light yellow. Wisk in 1/4 teaspoon salt and ⅛ teaspoon pepper

3)Add eggs to the pan.  Tilt the pan to spread the eggs in a thin layer across the cooking surface

4)Cook over medium-high heat, until the egg is cooked on the bottom, but runny on top, about 2 minutes

5)Place the tortilla on top of the unset eggs

6)Cook over medium heat for 30 seconds, lifting the tortilla around the edges until the egg sticks to the tortilla and lifts easily off the pan

7)Flip the tortilla/egg so that the back of the tortilla touches the pan

8)Put cheese on top of the egg

9)Continue to cook over medium heat until the egg is puffy, the tortilla is light brown, and the cheese is melted

10)Fold the tortilla in half and serve