CAPSULE REPORT: It takes a true master of chocolate to make delicious sugar-free versions of his or her art, and who better to take on the challenge than Manhattan's own Martine Leventer, creator of Martine's Chocolates? We've already raved about her top-notch gourmet chocolate in a past review, but we are delighted to report that she makes excellent sugar-free chocolates, too, from the fine Belgian chocolate of Callebaut. They are perfect for people who have been searching for a high-quality gourmet chocolate that's so good, it's easy to forget that it's sugar-free. (Please note that this is not a low-calorie product, and should be consumed by people who need to restrict their intake of sucrose. Those on restricted diets should consult with their healthcare advisors before consuming any sugar substitute