01 - Combine sliced beef with soy sauce, olive oil, garlic powder, and black pepper in a bowl. Mix thoroughly and marinate for 10 minutes.
02 - Heat a nonstick skillet over high heat. Add marinated beef and cook for 2 to 3 minutes until browned and just cooked through. Remove from heat.
03 - In a small bowl, whisk together Greek yogurt, mayonnaise, Dijon mustard, lemon juice, salt, and pepper until smooth.
04 - Lay lettuce leaves on a flat surface and spread a small amount of sauce over each leaf.
05 - Distribute cooked beef evenly onto lettuce leaves, then top with carrot, cucumber, and spring onion. Add sesame seeds and cilantro if desired.
06 - Fold or roll the lettuce leaves around the filling to form wraps. Serve immediately.