Chop three-fourths cup cold cooked chicken or veal, and pound in a mortar. Add gradually one-half cup heavy cream, and force mixture through purée strainer. Add one-half tablespoon granulated gelatine dissolved in three tablespoons White Stock. Add another one-half cup heavy cream and season with salt, cayenne, and horseradish powder. Pour jelly into small moulds one-third inch deep, using lemon Sauterne, or aspic. When firm, fill moulds with veal mixture and set aside to chill. Remove from moulds and serve on lettuce leaves.