Quinces, though tart, have a fragrant, almost floral aroma and flavor, reminiscent of violets. They make for a dramatic presentation with their translucent pink color. The Port wine, cinnamon and sugar more than balance the natural tartness of the quince, to result in this unusual and unforgettable dessert.
Preheat oven to 350 degrees.
In a medium bowl, mix brown sugar, wine and cinnamon.
Place quinces in buttered baking dish. Pour mixture over and bake until tender, about 50 minutes.
Let cool. Serve topped with syrup from baking dish.