Pat the steak dry with paper towels and season both sides generously with black pepper.

In a bowl, combine soy sauce, minced garlic, and sesame oil. Marinate the steak in this mixture for at least 30 minutes in the fridge.

Preheat a grill or skillet over medium-high heat. Add vegetable oil to prevent sticking.

Sear the marinated steak for about 4-6 minutes on each side for medium-rare doneness. Flip only once to achieve nice grill marks.

Remove from heat and let rest for 5 minutes before slicing against the grain into thin strips.

Serve alongside sautéed vegetables or rice, drizzling any remaining marinade on top.