Mix the tandoori powder with enough water to make a wet paste.
Salt the chicken pieces.
Add the paste and the chicken to a bowl, and mix well.
Cover and marinate in the fridge for a couple of hours, or if possible, overnight.
Remove the chicken from the fridge an hour before you want to cook and allow to come to room temperature.
Cook the chicken until a meat thermometer reads an internal temperature of 75C, and the chicken is nicely browned. Either roast in the oven at 200C for about 20-25 minutes, or cook in a frying pan or on the BBQ.