2 large skirt steaks (~2.5 lbs)
Place the steaks in a Ziploc bag and add a teriyaki marinade to a Ziploc bag. Remove the air from the bag, and refrigerate for 3 to 24 hours. Once marinated, on a grill on high temperature, grill steaks 4 minutes per side. A little char on the outside is okay.
To make a marinade pan sauce after marinating, add the leftover marinade to a saucepan and cook on high until reduce by half. To add some additional flavor and freshen the sauce, add a tablespoon of cooking sauce at the very end. Serve on top of the steak and mashed potatoes.