Preheat the oven to broil (usually 500 degrees F).

Score both sides of the meat to allow the marinade to soak into the meat. I like to score it along the grain, but you can do either!

Sprinkle both sides with thyme, freshly ground pepper and salt. Press it into the meat so it stays.

In a glass baking dish or ziplock bag, add Bo Soy sauce.

Add flank steak to the dish or bag and coat all sides of the meat.

Marinate for a minimum of 30 minutes.

Line a baking sheet with aluminum foil for easy cleanup. Top with a baking wire rack (optional) and broil for 8 minutes per side or until desired doneness.

Let sit for 5 minutes before serving.

Cut against the grain at an angle to serve.