Heat olive oil in a large skillet and add the strips of skirt steak. Season with salt & pepper and cook 5-7 minutes. Remove from the pan.
Add onion and bell peppers to the pan and cook until slightly soft. Remove from skillet.
Place the tortilla in the pan and add a layer of cheese on half of the tortilla followed by the steak, peppers and onions. Top with more cheese and fold in half.
Cook for 6 minutes over medium heat, flipping half way.
Serve with cheese sauce and garnish fresh parsley.