Traditionally, gazpacho was made by pounding the vegetables in a mortar with a pestle; this more laborious method is still sometimes used as it helps keep the gazpacho cool and avoids the foam and completely smooth consistency created by blenders or food processors. A traditional way of preparation is to pound garlic cloves in a mortar, add a little soaked stale bread, then olive oil and salt, to make a paste. Next, very ripe tomatoes and vinegar are added to this paste. In the days before refrigeration the gazpacho was left in an unglazed earthenware pot to cool by evaporation, with the addition of some water.