Stir all ingredients (except chicken) in a medium bowl. Toss chicken around to coat well with the marinade. Cover bowl with a plastic wrap and let marinade in refrigerator for at least 2 hours or up to overnight.
Place a oven safe wire rack in a baking sheet and set aside. Position a oven rack about 6-inches from the heat element and turn on broil.
Place chicken thighs over the wire rack placed in a baking sheet ( the wire rack well help all the moisture to drip down). Let broil for about 20 minutes, until chicken is cooked and slightly charred. Alternatively, you can grill chicken.
Notes
Kasoori methi or dry fenugreek leaves is an authentic ingredient in tandoori chicken. It can found at all Indian grocery stores or Amazon. But, this chicken will be still delicious without it.