Place all the marinade paste ingredients in a food processor or blender. Blitz until the paste has a fine texture but is not completely smooth.
Use a sharp knife to make a couple of cuts in the top of each chicken thigh. Place the thighs in a large ovenproof dish and cover each one completely with the marinade paste, pushing it into the cuts. Cover and place in the fridge for about 1 hour to marinate.
Towards the end of the marinating time, preheat the oven to 180°C. Remove the covering from the marinated chicken thighs and place in the preheated oven. Bake, uncovered, for 35-40 minutes, basting with any cooking juices halfway through.
The chicken will be ready when it is no longer pink inside and the juices run clear. If there are any signs of pinkness, return to the oven and cook for a little longer.
Serve hot or cold with some basmati rice or other accompaniment of your choice.