Preheat oven to 425 degrees F. Line a rimmed baking sheet with parchment paper or a silicone baking mat; set aside.
In a small bowl, combine the garlic, oregano, coriander, thyme, cumin, cinnamon, cayenne, 1 teaspoon kosher salt, and 3/4 teaspoon black pepper. Add olive oil and stir into a thin paste.
3 cloves garlic, 2 teaspoons dried oregano, 1 and 1/2 teaspoons ground coriander, 1 and 1/2 teaspoons dried thyme, 1/2 teaspoon ground cumin, 1/4 teaspoon ground cinnamon, 1/8 teaspoon cayenne pepper, kosher salt and black pepper, 1 and 1/2 Tablespoons olive oil
Slice chicken into thin strips and place on the baking sheet. Pour the spice blend on top, being sure to scrape out all the spices, then use your hands or kitchen tongs to toss and gently rub the spices into the chicken. Spread chicken out in a single layer on the baking sheet.
2 pounds boneless, skinless chicken thighs
Bake chicken for 15-20 minutes, until it reaches 165 degrees F. Toss halfway if you can.
While the chicken is roasting, prep your toppings: wash the lettuce, chop the tomatoes and cucumbers, crumble the Feta if needed, open or make the Tzatziki sauce, and get out the pitas.
2-3 cups shredded lettuce, 1 cup cherry tomatoes, 1/2 English cucumber, 1/2 cup crumbled Feta cheese, 1/4-1/3 cup Tzatziki sauce
When chicken is done, remove from the oven and spritz lemon juice on top. Place pitas in the still-warm oven to heat briefly.
2 Tablespoons lemon juice, 6 pitas
Serve in bowls, or stuff pitas with chicken and toppings as desired. Enjoy!