Grad or chop everything. Then mix onions, garlic, ginger root, and horseradish root in a quart jar.
Add about 2 cups of warm raw apple cider vinegar to cover. (Warming the vinegar allows it to more actively draw the properties out of the herbs.)
Cover with lid and shake well. Let the mixture sit at room temperature (near a sunny window) for 3 to 4 weeks. Strain and discard the spent herbs after a few weeks. Now add the honey and the cayenne pepper (~1/3 cup of honey and ~1 tsp cayenne powder- more or less depending on your preference!) Refrigerate and use within a month- though it can last a few months when refrigerated.