Slice the flap steak into thin small slices. Transfer into a bowl.
Add the olive oil, lemon juice, and spices to the steak. Mix to evenly marinade the steak. Cover and place in the fridge to season from 30 minutes up to overnight.
Heat a oiled skillet or pan over high heat. Add the meat. Cook just until all redness is gone and the beef turns a dark brown color. Take off the heat.
Serve in a wrap, in a salad, sandwich, or a shawarma quesadilla. It's delicious in everything!