Adapted from the Barefoot Contessa's Foolproof If you feel like getting ahead, you can marinate the chicken in the mustard and buttermilk overnight or for a few hours; if you don't have time, don't worry. I made this for my in-laws without marinating the chicken at all, and they raved. If you marinate the chicken, too, the buttermilk definitely acts as a tenderizer. You can use any combination of bone-in, skin-on thighs or drumsticks. I love using thighs with this recipe. A few changes from…