Grilled Ham Hocks with Rocket and Mustard Aioli

I love the way braised meats taste when they are grilled, and this rather esoteric-sounding dish is really very simple in its effect. The bite of the rocket and mustard is a perfect foil to the richness of the ham. If you do not have rocket (arugula) and radicchio, use any bitter greens from the endive-chicory family, and maybe some wilted red cabbage for color.