The candies created by Seth Ellis Chocolatier are wildly expensive, but each small piece yields a sensational level of flavor. These candies are developed by Rick Levine, who's devoted to the natural and organic and would rather boil down a field of mint leaves to create the decorative green squiggle on a chocolate than resort to artificial flavor. As a result, the pieces are elegant and inventive — an unusual marriage of lemon peel and dark chocolate, for example, or Levine's nut-free take on the peanut-butter cup, which uses sunflower-seed butter. You can find Seth Ellis chocolates at Whole Foods or order them online.