01 - Combine sliced beef with soy sauce, olive oil, garlic powder, and black pepper in a bowl. Mix thoroughly and let it rest 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 and set aside.
03 - Mix Greek yogurt, mayonnaise, Dijon mustard, lemon juice, salt, and pepper in a small bowl until smooth.
04 - Lay out the lettuce leaves and spread sauce evenly on each leaf.
05 - Distribute the cooked beef evenly over the lettuce leaves, then top with julienned carrot, cucumber, and sliced spring onions. Add toasted sesame seeds and chopped cilantro if desired.
06 - Roll or fold lettuce leaves around the fillings to create wraps and serve immediately.