passed down from my Grandma Sarah and Aunt Bella
For approximately 1 pound peeled raw horseradish, use approximately 2-3 small peeled fresh beets
1/4 cup cider vinegar, 1 tsp salt, 1 tsp sugar, water to taste
shred radish and beets in the food processor… Be very careful that you don’t inhale fumes. This can be very painful. Much worse than onions.
put shredded stuff back in the food processor with steel blade… until it is finely chopped.
The rest is just guesswork. Not all horseradish is created equal. Some are riper than others and that affects how strong it is. There are ways to mitigate this problem. Leave uncovered for a couple of hours. Adding water, more sugar, more beets, even some lemon juice will help. The taste changes from day to day so it might taste better the longer it sits in the fridge. I would make this about three days before serving.