I know there are several beautiful Membrillo-posts out there (f.ex. written by Melissa , Elise , Nicky , Aran , Pastry Studio - to name just a few), but I used a somewhat different method to make this delicious Spanish quince paste, so it's worth sharing the recipe after all. We were served the Queso con Membrillo on several occasions during our trip to Spain in Spring 2008 (for example, here's a plate we enjoyed at Rincón del Chorro, Albarracin, Aragon ), and I've made the quince paste twice at home since then. Quinces are only available at the markets here during early Winter, and not widely familiar to people at all. By the way - if you've got small children at home, then try serving them some of the puréed quince before adding the sugar. Our daughter LOVED the unsweetened quince pureé!! Quince Paste ( Küdooniamarmelaad 'Dulce de Membrillo' ) 6 large quinces (about 1,5 kg) water about 1 kg caster sugar lemon juice Wash the quinces and place into a large sau...