Directions

1. In a blender, combine chopped onion, garlic, 3 tablespoons lemon juice, and ginger. Puree until smooth, scraping down sides of blender as necessary, about 30 seconds. Transfer to a large bowl and stir in yogurt, garam masala, 2 teaspoons salt, and teaspoon pepper. Add chicken and toss to coat. Cover and refrigerate at least 8 hours (or up to 1 day).
2. Heat grill to medium; clean and oil hot grates. Remove chicken from marinade, wiping off excess. Grill chicken until cooked through, 12 to 14 minutes, turning occasionally.
3. In a small bowl, combine cucumber, sliced onion, cilantro, oil, and 2 tablespoons lemon juice; season cucumber salad with salt and pepper. Serve chicken with salad and naan if desired.