We enjoy an occasional steak dinner. I like grilling hanger or skirt steaks because they are thin, take only a few minutes per side, are very flavorful, and the leftovers (if any) can be used to make delicious sandwiches. The secret sauce is a combination of mayonnaise and kalamata olives. It is the perfect accompaniment to the steak for dinner (served on the side) or as a spread on this sandwich.
Note: Substitutions make for nice variations on this sandwich:
Swiss or Cheddar cheese.
Roasted red peppers.
Mayonnaise flavored with a smoky barbeque sauce.