Mustard Greens with Salt Pork and Spicy Vinegar

Mustard greens are a Southern staple. At Izola's, they're simmered for a long time with salt pork and sugar—a simple method that yields sumptuous flavor. Dousing the cooked greens with chile-infused vinegar sharpens their flavor. Restaurateur Izola White sometimes adds a dash of coffee to the vinegar to deepen its color and taste.