01 - Using a sharp knife, cut deep slashes into the chicken pieces to allow marinade penetration.
02 - In a large bowl, whisk together yogurt, lemon juice, vegetable oil, garlic, ginger, cumin, coriander, paprika, garam masala, turmeric, chili powder, and salt until smooth and well combined.
03 - Add chicken pieces to the marinade, turning to coat completely. Cover bowl and refrigerate for at least 4 hours, preferably overnight for optimal flavor development.
04 - Preheat oven to 430°F or prepare grill for medium-high heat. Line a baking tray with foil and place a wire rack on top.
05 - Arrange marinated chicken on the rack. Roast or grill for 30-35 minutes, turning pieces halfway through cooking, until meat is cooked through and edges are slightly charred.
06 - Transfer chicken to a serving platter. Garnish with chopped cilantro, lemon wedges, and sliced red onion. Serve immediately while hot.