First, marinate the chicken. Combine the thin slices of chicken with the lemon juice, olive oil, garlic and all of the spices and seasonings in a bowl. Stir it all together thoroughly to coat the chicken. Cover the bowl and let it sit in the refrigerator for an hour. While it marinates, prepare the spinach salad for assembly. Combine the spinach, grape tomatoes, cilantro and lemon juice in another bowl. Toss it all together well.

When the chicken is done marinating, heat up a large skillet with deep sides over medium high heat. Pour the chicken with the marinade into it and let the chicken cook through completely for 10-15 minutes, stirring it often. Then take it off of the heat and assemble the chicken shawarma! Lightly warm up the pita bread in the toaster without letting it get crispy. Then spread a spoonful or two of hummus on each pita bread. Divide the chicken and salad evenly among the pita as well, then wrap each of them in foil to help hold it all together. Serve immediately and enjoy!