Martha's friend Madge Miller shares her fresh horseradish recipe. Serve this classic sauce with gefilte fish at your next seder.
In the bowl of a food processor fitted with the blade attachment, pulse horseradish until coarse, about 30 seconds. Add beets, vinegar, sugar, salt, and 1/4 cup water. Process until fine, but not pulverized, about 1 minute. Store in an airtight container in the refrigerator for up to 2 weeks.