This chicken dish is sweet, tangy, and has a roundness from mustard flavor and light herbal lift from rosemary. I like to serve it with roasted broccoli or a side salad. You can marinate this days ahead (or freeze marinated chicken) and then grill, bake, or pan-fry, as desired.
You can also bake these in a preheated 350ºF oven for about 40 minutes, or until the internal temperature reaches 175ºF. If baking, be sure to lightly oil the baking dish to prevent sticking. A quick broil at the end will brown the tops nicely.