Process the fenugreek, ginger, mint, garlic, coriander, salt, vinegar, cardamom and clove in the mixer until you get a smooth paste.
Place the chicken in an oven dish and rub it whole with the spice paste; cover it and leave it marinating in the fridge for 4 hours.
Preheat the oven and roast the chicken for 45 minutes until it is browned. Serve with cooked rice on the side.