Ingredients: Newly ground black pepper,4 boneless, skinless chicken-breast halves,1 tablespoon fresh rosemary leaves or 1 teaspoon dried rosemary,2 garlic cloves, peeled and halved lengthwise,1 teaspoon kosher salt,1/ 2 cup low-sodium chicken broth,1 tablespoon olive oil,1/ 2 cup sherry vinegar,1 tablespoon saltless butter
Guidelines: