Though there are several elements to this dessert, they can all be made ahead, and together they are a wonderful blend of flavors and textures. However, if you don’t have time for the entire preparation, keep in mind that the poached pears are very good on their own, topped with the yogurt sauce and candied walnuts. Conversely, the blueberry jelly makes a lovely dessert as well, spooned into glasses and topped with minted yogurt and candied walnuts.