• 5 tablespoons soy sauce
• ¼ cup chopped green onion
• 2 ½ tablespoons white sugar
• 2 tablespoons minced garlic
• 2 tablespoons sesame seeds
• 2 tablespoons sesame oil
• ½ teaspoon ground black pepper
• 1 pound flank steak, thinly sliced

Whisk soy sauce, green onion, sugar, garlic, sesame seeds, sesame oil, and pepper together in a bowl. Place flank steak slices in a shallow dish. Pour marinade over top. Cover and refrigerate for at least 1 hour or overnight. Preheat an outdoor grill for high heat, and lightly oil the grate. Quickly grill flank steak slices on the preheated grill until slightly charred and cooked through, 1 to 2 minutes per side.