01 - Using a sharp knife, make shallow cuts in the chicken pieces to allow the marinade to penetrate deeply into the meat.
02 - In a large mixing bowl, whisk together the Greek yogurt, lemon juice, vegetable oil, garlic paste, ginger paste, ground coriander, cumin, garam masala, Kashmiri chili powder, turmeric, salt, and black pepper until thoroughly combined.
03 - Add the scored chicken pieces to the bowl with the marinade. Turn the pieces to ensure complete coating on all sides. Cover the bowl tightly and refrigerate for a minimum of 6 hours, preferably overnight for optimal flavor penetration.
04 - Preheat your oven to 450°F. Line a baking sheet with aluminum foil and place a wire rack on top to allow air circulation and even cooking.
05 - Remove chicken from marinade, shaking off excess liquid. Arrange pieces on the wire rack in a single layer. Bake for 25 to 30 minutes, turning once halfway through cooking, until the chicken is fully cooked and edges are slightly charred.
06 - For authentic tandoori flavor, switch to broil on high setting for 2 to 3 minutes to achieve additional charring. Alternatively, grill over hot coals for a few minutes per side.
07 - Let the chicken rest for 5 minutes to allow juices to redistribute. Garnish with thinly sliced red onion, fresh lemon wedges, and cilantro leaves. Serve immediately while hot.