In a bowl, mix the yogurt, lemon juice, minced garlic, minced ginger, curry powder, turmeric, cumin, sweet red pepper powder, salt, and black pepper.
Place the chicken pieces in the marinade and make sure they are well coated on all sides.
Cover the bowl and refrigerate for at least 2 hours, preferably overnight for a stronger flavor.
Heat the grill or oven. Take the chicken pieces out of the marinade and place them on the grill.
Grill on both sides until cooked through and golden brown.
Serve the tandoori chicken with a green salad or grilled vegetables for a complete and balanced meal.