Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           sour cream
   2      teaspoons     prepared horseradish
   1      tablespoon    chopped fresh mint
   1      tablespoon    dijon mustard
   1      large         garlic clove -- minced
   2                    lamb leg steaks (3/4-inch-thick)
                        salt and pepper

Preparation:

Combine first three ingredients. Set aside. (Can be prepared 1 day ahead. Cover and refrigerate.) Prepare barbecue (medium-high heat) or preheat broiler. Combine mustard and garlic and rub on both sides of lamb. Season with salt and pepper. Grill lamb to desired doneness, about 5 minutes per side for medium-rare. Serve immediately with sauce.