Mix the lettuce with pepper, salt, olive oil and set aside.
Season the steak with pepper and salt.
Heat a pan over high heat and cook the steak on both sides to your liking. Let the meat rest for a while and then cut it into thin slices.
Cut 8 slices of bread and grill them briefly until they are lightly crispy.
Cover the bread with the prepared lettuce and spread the thinly sliced steak over it.
Finish off the sandwich with Hela Gouda Cheese Sauce and serve immediately.