It is best marinated over night but works okay if you do first thing in the AM, don’t marinate for more then 24 hours.
1/3 c. reduced-sodium soy sauce
1/3 c. packed light-brown sugar
1/4 c. sliced scallions (green onions) make sure you use the white and green part of the onions
1 T. (Tablespoon) sesame oil
1 T. Sesame seeds
2 t. (teaspoons) chopped or minced garlic
1 t. minced fresh ginger OR I use 1 t. powdered ginger when I don’t have fresh.
1 flank steak (about 2 pounds)
In a bowl stir together soy sauce, sugar, scallions, sesame oil, sesame seeds, garlic and ginger. (Instead of a bowl, I just put it all in a gallon sized ziplock and then place the meat inside and then put the bag on a sheet pan in the refrigerator to marinate.)
Lay out the steak on a cutting board, cover with plastic wrap and pound with the flat side of a meat mallet. Then take off the plastic wrap and pound with the pointed side of the mallet or use a fork. You want it to be as thin as you can get it. Then slice against the grain of the meat long strips on both sides of the steak. Then fold up the steak to fit into a gallon size ziplock bag or place in a flat casserole dish.
Pour the marinade onto the steak making sure all is coated. If you put into a bag then seal and place bag in a large bowl or flat on a cookie sheet, in case of leaks. If you are going to marinate in a dish then cover the dish and turn over steak when you wake up so both sides are getting the marinade. Marinate in the refrigerator.
After many hours...heat grill or broiler. Remove steak from bag and grill or broil for 5 minutes (or so depending on thickness) per side or until meat registers 135 degrees on an instant-read thermometer for medium-rare. Allow meat to rest for 5 minutes before slicing (cover with foil while resting).
In the meantime, place marinade in small saucepan and bring to a boil. Reduce heat and simmer for 5 minutes stirring.
Slice steak against the grain as thin as you can. Pour boiled marinade over or serve on the side - Enjoy!