01 - Combine the thinly sliced beef with soy sauce, olive oil, garlic powder, and black pepper in a bowl. Mix thoroughly and let rest for 10 minutes.
02 - Heat a nonstick skillet over high heat. Add the marinated beef and cook for 2 to 3 minutes until browned and cooked through. Remove from heat and set aside.
03 - In a small bowl, blend Greek yogurt, mayonnaise, Dijon mustard, lemon juice, salt, and pepper until smooth.
04 - Arrange lettuce leaves on a flat surface. Spread a thin layer of sauce on each leaf.
05 - Distribute the cooked beef evenly over the lettuce leaves.
06 - Layer julienned carrot, cucumber, and sliced spring onions atop the beef. Sprinkle sesame seeds and cilantro if using.
07 - Fold or roll the lettuce leaves around the filling to form wraps. Serve immediately.