- 1 pound flank steak, thinly sliced
- 5 tablespoons soy sauce
- 1/4 cup sriracha sauce
- 1/4 cup chopped green onion
- 2 1/2 tablespoons white sugar
- 2 tablespoons whole dried cayenne peppers
- 2 tablespoons minced garlic
- 2 tablespoons sesame seeds
- 2 tablespoons sesame oil
- 1 teaspoon ground cayenne pepper, or to taste
- 1/2 teaspoon ground black pepper
- Place flank steak slices in a shallow dish.
- Mix soy sauce, sriracha sauce, green onion, sugar, whole dried peppers, garlic, sesame seeds, sesame oil, ground cayenne, and black pepper together in a bowl. Pour over steak. Cover with plastic wrap and refrigerate to marinate, at least 1 hour but preferably overnight.
- Preheat an outdoor grill for high heat, and lightly oil the grate.
- Remove steak slices from marinade and grill on preheated grill until slightly charred and cooked through, 1 to 2 minutes per side.
- Simmer marinade in a wok or skillet over medium heat until thick and the consistency of gravy; pour over grilled steak.