In a gallon-size freezer bag, combine the vinegar, oil, honey, mustard, and salt. Add the chicken, seal the bag, and massage to combine.
Place in the fridge and allow the chickken to marinate for at least 4 hurs or overnight.
Remove the chicken from the fridge 30 minutes prior to grilling, Preheat the grill to medium-high. Use tongs to lift chicken from bag, shake off excess marinade, and carefully place on the gril (will flame up).
Close the grill lid and cook for 3 to 4 minutes per side, or until nicely charred and the chicken is cooked through (165° F/74°C on an instant-read thermometer).
If you don't have access to an outdoor fgrill,an indoor nonstick grill pan on the stovetop works well.
Notes
Flanagan, Shalane & Kopecky, Elyse (2018) Run Fast Cook Fast Eat Slow Rodale Publishing