01 - In a large bowl, whisk together Greek yogurt, garlic, lemon juice, olive oil, oregano, cumin, paprika, salt, pepper, and lemon zest until well combined.
02 - Add the chicken breasts to the marinade, turning to coat thoroughly. Cover and refrigerate for at least 2 hours, up to 8 hours for maximum flavor absorption.
03 - Preheat grill to medium-high heat or preheat oven to 425°F.
04 - Remove the chicken from marinade and let excess drip off. Discard any leftover marinade.
05 - For grilling: Place chicken on grill, cook for 6–8 minutes per side or until internal temperature reaches 165°F. For oven: Place chicken on a lined baking sheet, bake 18–22 minutes or until cooked through.
06 - Rest the chicken for 5 minutes before slicing to retain juices. Garnish with parsley and serve with lemon wedges.