Butterflied Chicken in a Mustard Buttermilk Marinade is a flavorful and juicy chicken dish that is perfect for grilling or roasting. The chicken is marinated in a tangy and creamy mixture of mustard, buttermilk, garlic, and herbs, which infuses it with delicious flavors. The butterflied chicken cooks quickly and evenly, resulting in a crispy skin and tender meat. Serve this dish with a side of roasted vegetables or a fresh salad for a satisfying meal.