Heat oven to 250 degrees c. Make the rub: In a small bowl, combine the oregano, mustard, coriander, thyme, sage, and 1 1/2 teaspoon each salt and pepper. Rub 3 tablespoons of the herb mixture into both sides of the lamb chops.
Heat the braai to medium-high heat. Cook the lamb until browned, 2 to 3 minutes per side. Transfer to a baking sheet and roast, 4 to 6 minutes for medium-rare. Serve with salad, if desired.