This popular Spanish cheese accompaniment is made with local quince, according to the Vallés family recipe that has been handed down for generations. That recipe calls for just three ingredients: quince, sugar, and lemon, cooked down into a reddish paste. It is fruity and balanced yet not overly sweet.  The firm, gelled texture is perfect for slicing. No additives or preservatives. Pair with a wide array of cheeses, use as a glaze, or eat as dessert.