8 (6-ounce) loin lamb chops, fat trimmed
Kosher salt and freshly ground black pepper
2 tablespoons vegetable oil
2 cloves garlic, smashed
1 cup dry red wine
1 teaspoon minced fresh rosemary leaves
1 cup chicken broth, low-sodium canned
2 tablespoons unsalted butter, cut into bits
2 teaspoons whole-grain mustard
2 tablespoons heavy cream