Marinate the chicken with the spices listed above and the vinegar. Let it marinate for up to a full day, or at least a few hours.

Heat a skillet with oil. Once hot, add the chicken. When the chicken starts to brown, add the onions and sauté until they get some color. Add the bell peppers, stir for a bit, then turn off the heat.

Lay out the bread and spread a layer of the chicken shawarma. If you have fried potatoes, add a layer of potatoes. Roll up the sandwich. Brush a grill pan with a little oil and grill the sandwich, starting with the seam side down. Enjoy!