Preheat oven to 425℉. Line an 9x13 inch metal pan with parchment paper.
In a large bowl, using your hands, combine the chicken, grated zucchini, egg, red onion, parsley, breadcrumbs, salt, garlic powder, onion powder, paprika, coriander, cumin, nutmeg and olive oil. Next, lightly drizzle and brush the pan with olive oil. Transfer the chicken mixture to your pan and gently flatten it out evenly all the way to the edges. Using a bench scraper or a knife, slice the mixture into 8 long kebab strips. To give the meat that classic kebab look, use the bench scraper to make 1/2 inch apart indentations (see photos above). Lightly brush the top with olive oil and bake for 25-30 minutes. Broil for 1-2 minutes if it hasn't gotten golden brown on top.
Assembly:
Spread tzatziki onto the center of a lavash wrap, and top with the kebabs, red onion, tomatoes, more tzatziki and parsley. Fold the lavash over and enjoy!