- 1/2 pound trimmed radishes, quartered (1 1/4 cups)
- 3/4 pound seedless cucumber (usually plastic-wrapped), peeled and chopped (2 cups)
- 2 cups well-shaken chilled buttermilk
- 1 teaspoon salt
- 1 teaspoon seasoned rice vinegar
- 1/2 teaspoon sugar
- Garnish: thin slices of cucumber and radish
- Purée all ingredients in a blender until very smooth. Serve immediately.