Mark Militello, chef-owner of Mark's South Beach on Miami Beach and Mark's Las Olas in Fort Lauderdale, created this fiery, smoky sauce after a sojourn in the French West Indies. It's everything a barbecue sauce should be -- sweet, tart, fruity, fiery and smoky -- and the perfect topper for a grilled fish steak or chicken. It's made with Scotch bonnets, the chile of choice in the West Indies and the hottest chile around. Scotch bonnets are similar in appearance to habaneros, which can be substituted.