01 - Combine cumin, smoked paprika, coriander, cinnamon, turmeric, chili powder if using, salt, and black pepper in a small bowl.
02 - Pat chicken breasts dry using paper towels to ensure better marinade absorption.
03 - Whisk olive oil, minced garlic, lemon juice, chopped cilantro, and the prepared spice blend in a large bowl until well combined.
04 - Add chicken breasts to the marinade, turning to coat evenly. Allow to marinate at room temperature for 15 minutes or refrigerate up to 2 hours for enhanced flavor.
05 - Set oven to 400°F and preheat.
06 - Heat an oven-safe skillet over medium-high heat with a drizzle of olive oil. Sear each chicken breast for 2 minutes per side until golden brown.
07 - Transfer skillet to preheated oven and bake for 18 to 20 minutes or until internal temperature reaches 165°F.
08 - Remove chicken from oven and let rest for 5 minutes. Slice and serve garnished with extra cilantro and lemon wedges.