HIT! 30-Minute Mongolian Beef (PF Chang's copycat recipe) by justataste: Thin slices of flank steak, minced fresh garlic and ginger, dark brown sugar and soy sauce. Toss it all together and 30 minutes later you’ll be chowing down... #Beef #Flank_Steak #Oriental #Mongolian_Beef. Really good and really easy.