Combine the tomato paste, vinegar, garlic, paprika, red pepper, coriander, cumin, oregano, sumac, 2 tablespoons salt, 1 teaspoon black pepper and 1 cup water in a large mixing bowl. Whisk until thoroughly mixed.
Put the chicken in a large bowl and pour the marinade over the chicken; mix thoroughly. Cover and refrigerate overnight.
Place a rack in the center of the oven and preheat the oven to 350 degrees F.
Fillet open the chicken thighs, making them as thin as possible. Stack the chicken vertically on a skewer, pushing it down as you go to make it as tight as possible.
Place the chicken on a baking sheet and bake until golden brown, about 10 minutes per side. Slice the chicken into thin pieces and serve with Zaytoon Garlic Sauce.
Zaytoon Garlic Sauce:
Add the potatoes, mayonnaise, garlic, lemon salt, 1 tablespoon kosher salt and 1 cup ice to a 20-cup food processor. Process until smooth and creamy.
If using a smaller food processor, mix all the ingredients in a bowl, and then process in batches.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.