Convento de San Leandro

This guide to the Convento de San Leandro in Seville starts with a simple kitchen question, what a convent does with the egg whites left over from its centuries-old yema recipe, and follows the answer down the street to another convent's kitchen. You'll hear about the Augustinian nuns who have lived here since 1369 and how their trademarked sweet is sold through a blind revolving hatch in the wall, no seller ever seen on the other side. Listen for the bell beside the hatch before you step up to ring it yourself.