Wash and cut the vegetables into thin strip (if you haven't done the yet) and set aside. Also cut the chicken or beef into this strips and set aside

In a pan, heat up a tablespoonful of oil add the marinated chicken/beef & stir fry until juicy and brown

Mix some mayonnaise and ketchup together (mayonnaise - ketchup spread) place a shawarma bread on a clean flat surface and cut into two equal sizes (that's if you are using a large pita read) spread the mayo ketchup on it and then fill it with the sliced vegetables on one end and sprinkle some chili pepper (optional)

Tip if you want to warm it up a bit place on a heated pan for 3 minutes (the closed edge facing the pan) if you have a microwave or sand which maker feel free to use those too