Ingredients

  • 3/4 cup dry red wine
  • 1/2 cup extra-virgin olive oil
  • 1/3 cup coarse-grained mustard
  • 1/4 cup red wine vinegar
  • 4 tablespoons fresh rosemary leaves (6 sprigs)
  • 2 tablespoons drained green peppercorns in brine
  • 1 tablespoon dried oregano
  • 2 large garlic cloves
  • 1 4-to 5-pound leg of lamb, boned, butterflied, trimmed of excess fat

Method

  • Combine first 8 ingredients in blender.
  • Puree until rosemary is completely ground, about 3 minutes.
  • Place lamb in large glass baking dish with 2-inch high sides.
  • Pour marinade over lamb, making certain all parts of lamb are covered with marinade.
  • Cover; chill at least 8 hours or overnight.
  • Let stand 2 hours at room temperature before cooking.
  • Prepare barbecue (medium-high heat).
  • Remove lamb from marinade.
  • Sprinkle both sides of lamb generously with salt and pepper.
  • Grill lamb until brown and crusty on outside and thermometer inserted into thickest part registers 130F for medium-rare, turning occasionally, about 20 minutes.
  • Transfer to platter and tent with foil.
  • Let stand 10 minutes.
  • Cut on diagonal into thin slices.