Another recipe from Michael Natkin's "Herbivoracious". Nice switch from gazpacho, makes a light, easy summer dinner with a salad and some bread, although it will only give you 2 to 3 servings if you're making it a meal. The time-consuming part of this recipe is making the Recipe #483923, it needs to be made in advance. I found I needed to add more milk to get it to the consistency I wanted, but it's very flexible. The addition of some milk does cut the tartness of the buttermilk, though. Make it vegan by using a combination of part vegan sour cream and part alternative milk (rice, hemp, soy, etc.). Natkin suggests adding a little lemon zest to it; I think a small piece of chipotle in adobo would be wonderful, or maybe a garnish of cooked shellfish or diced avocado or roasted sweet corn.