Cut onion into slices and set aside. Slice the steak into strips or you can leave it whole and add it to a bowl or container with lid. Add all seasonings to the steak along with the vinegar and sliced onions. Give the meat a good mix coating the meat well. Put in fridge for 1 to 2 hours or overnight which is best. In a large pan on medium heat add about a tablespoon of oil and let that heat up. Then add in the steak and onions and giving that a good stir. Once steak is browned put a lid on and cook with lid for about 25 to 30 minutes. The steak is done and ready to plate.We served this with white rice and beans.