When coring the pears, make sure you also remove the fibrous portion along the line of the stem. Then, before serving, make sure to let the pears cool until they are just warm or room temperature. The flavor and texture is much richer once they've cooled. In fact, these pears are perfect for a dinner party or an event where food may be sitting out for a bit; the flavor actually gets better as they rest. Keep in mind the cooking time may vary depending on the variety of pear you use. Some are considerably firmer than others, so if the pears don't seem cooked enough after the suggested cooking time below, continue roasting them until they're very tender. It could take up to an additional half-hour if you get a really firm variety.