IN CÓRDOBA IN SUMMER, COME 11 AM, A HIGH-PITCHED DRONE SEEMS TO EMANATE FROM THE VERY WALLS OF EVERY HOUSE. THIS IS THE SOUND OF THE BLENDERS WORKING AWAY MAKING GAZPACHO FOR LUNCH. GAZPACHO IS A COLD SOUP THAT CAME TO SPAIN WITH THE ARABS. IT WAS ORIGINALLY MADE WITH BREAD, WATER, GARLIC AND SALT. OVER THE CENTURIES THIS BASIC SOUP HAS EVOLVED INTO MANY VARIATIONS. THE BEST KNOWN IS GAZPACHO ANDALUZ: A COLD SOUP MADE FROM BREAD, WATER, GARLIC AND SUMMER VEGETABLES. ANOTHER VARIATION