Blend together and use as a spread for canapes. Garnish as desired. The Int'l Horseradish Festival is held in Collinsville, Il (about 10 miles east of St. Louis, Mo) every May. Sixy percent of the worlds horseradish is grown there. It's pretty easy to grow. Why is it Hot? Highly volatile oils are released by enzyme activity when the root cells are crushed. To grind: Wash & peel dice in small cubes. Process in a blender with enough cold water to just cover. Add 2-3 T. white vinegar ane 1/2 t. Salt. Process no more than half a blender jar. The time you add the vinegar is critical as this determines how hot it will be. If you like it hot wait up to 3 minutes to add the vinegar as this stops the emzymatic action.