In a large bowl, add the chicken, garlic, olive oil, lemon juice, cumin, paprika, salt, curry powder, and pepper. Toss until coated and allow to marinate in the refrigerator for 30 minutes.
Preheat the oven to 425°
In a small bowl, mix together Greek yogurt, cucumber, lemon juice, olive oil, garlic, dill, salt, and pepper, until combined. Set aside.
Place marinated chicken on a baking sheet and bake for 10-15 minutes or until cooked through to 165° F.
Assemble pitas by stuffing the pita pockets with lettuce, tomato, cucumber, onions, tzatziki, feta, and any other toppings you love. Enjoy!