COOKING INSTRUCTIONS Place the horseradish pieces in a food processor.
Add a tablespoon/15 ml of water.
Keep adding water by the tablespoon/15 ml until the horseradish is well ground. You may need more or less water. Be careful: Ground up horseradish is potent, almost like chopped onions. If your mixture gets too liquidy, strain some of the water.
Add a tablespoon of vinegar and salt and continue to pulse to combine.
Transfer the horseradish to an airtight jar. It will keep in the refrigerator for 2 to 3 weeks. CHEF’S TIP The vinegar will stabilize the degree of hotness. If you prefer hot horseradish, wait a minute or two; if you prefer mild, add vinegar right away.