Slice the flank steak across the grain into ½” (1 ½ cm) wide strips. If the steak is very wide, you can slice it in half lengthwise with the grain first, then cross grain into strips. Place steak in a bowl, mix with marinade, then cover with plastic and allow to stand 45-60 minutes at room temperature. You can also mix it in a zip bag, press out the air and marinate.

Heat a large non-stick sauté or fry pan over medium heat. Drain marinade from steak through a sieve and set aside. Lay steak strips flat in the hot pan; don’t crowd them. Cook until one side is a browned and getting caramelized edges. Flip the pieces over and cook just briefly, then remove to a rimmed baking sheet or plate. Repeat with the other pieces until done.