I have a question about the ingredient "Prepared Horseradish" in any recipe, does prepared simply mean grated?
I think "prepared" is the horseradish you find in the jar as opposed to fresh horseradish root. The fresh is much stronger!
Actually fresh, grated can be wildly inconsistant. Prepared is the stuff in the jar which includes things like vinegar but any two jars will taste the same. "Horseradish sauce" is the mildest of the three.
go for the white, bottled variety; the red has beets added.