1. Dry chicken with kitchen paper, then cut diagonal slashes over the smooth side. Mix spices with seasoning, then tip onto a plate.
2. Brush the chicken on both sides with the oil, then coat all over with the spice mix. Heat a barbecue, griddle pan or grill, then cook the chicken for 5-6 mints on each side until cooked through. Serve each portion with a dollop of guacamole.