Make the marinade: In a medium bowl, whisk together yogurt, garlic, vinegar, paprika, red pepper flakes and salt. Spatchcock the chicken: Place chicken, breast-side down, on a cutting board.
Method: For the first step, you will have to marinate the chicken thighs and keep aside for a minimum of two hours. Once you think that the flavour has seeped in the chicken, it is time to grill it.