A Quince is a pear-shaped golden-yellow fruit that is very loosely related to the pear and the apple. It was a common element in medieval cooking, but is rarely used now. Its flavor is similar to that of the pear and apple, but much stronger and more sour. Because of its firm texture and sourness (even when ripe), it's not often eaten raw.
Quinces can be made into jams, jellies, and puddings. Since quince is very aromatic, it can be added to apple jams to increase their flavor. It can also be skinned and roasted or poached in wine and made into a cobbler or tart.