Can be prepared in 45 minutes or less but requires additional unattended time.

Ingredients

　　4 cups packed torn iceberg lettuce or romaine, rinsed and spun dry

　　1 1/2 cups buttermilk

　　1/2 cup packed fresh mint leaves

　　a pinch of sugar

　　In a blender blend the lettuce, the buttermilk, the mint, and the sugar until the mixture is smooth. Transfer the soup to a bowl, season it with salt and pepper, and chill it, covered, for 1 hour, or until it is cold.