Homemade Prepared Hot Horseradish

Place diced horseradish in a food processor; add a splash of cold water. Pulse on and off until mixture begins to blend. Scrape down sides of food processor container (the fumes are very strong so keep your face away from the bowl and the room well ventilated).

Continue blending adding a bit more water if mixture seems too dry. Process until horseradish is finely ground. Wait 2 minutes before adding the vinegar and salt; supposedly this makes the horseradish hotter. After 2 or 3 minutes add vinegar and salt. Continue processing until mixture is smooth and creamy or to your desired consistency adding more water if necessary. Transfer to airtight storage containers. Refrigerate.