Prepare the turkey thighs by slicing into ½-1 inch thick pieces. In a large bowl, mix together Jamie Geller Shawarma Spice, olive oil, lemon juice, and lemon zest. Add the turkey thighs and mix. Set aside or cover and refrigerate to marinade. For the sumac onion salad, in a separate bowl, mix the red onion with Jamie Geller Sumac, the apple cider vinegar and salt. Preheat oven to 350℉ / 180℃. To prepare the shawarma skewer, place half an onion (flat side down) on a baking sheet and press a skewer into it. Layer the pieces of turkey on the skewer. At this point, to prevent the shawarma from tipping over, you can use multiple skewers to add more support! Bake for 1 hour. It's recommended to place some oven-proof dishes around the shawarma to prevent it from tipping over. But if it does tip, it's okay, because this is a fun experimental cooking technique! Slice the shawarma once cool enough to handle and stuff the laffas with your favorite toppings!