Aged over 10 years across 5 American Oak butts (the barrels in a solera system) before being blended with Pedro Ximenez sherry, Lustau's PX Sherry Vinegar is some of the best in the world. Sweeter than is typical, you can think of this as Spain's version of Italy's agrodulce vinegars, with a sweet/tart flavor profile perfect for salads, roasted veggies, and any number of Andalusian dishes.