In a shallow dish, whisk together soy sauce, vinegar, oil, ginger and garlic. Add steaks and turn to coat well. Let stand for at least 15 minutes or cover and refrigerate for up to 4 hours.
Garlic Sesame Cream Cheese:
In a bowl, using a wooden spoon, beat together cream cheese, sesame seeds, soy sauce and garlic until smooth. Cover and set aside.
Prepare grill to medium high heat and grill steaks for about 4 minutes per side or until medium rare. Remove to a platter. Let stand for 3 minutes before slicing. Stir together butter and cilantro and toss with sliced steak.
Spread each of the tortillas with Garlic Sesame Cream cheese and top each with some of the steak, lettuce, carrot and cucumber.
Roll up and enjoy!