Today I provided a platter of very good (purchased) roast beef with horseradish sauce I whipped up. Since I was pressed for time, I made the simplest recipe I could find which was basically 1 C of sour cream and 3 T of processed horseradish. I ended up flavoring it with a little sugar, and some Hellmann's, because I found the sour cream too sour with the horseradish. I actually like the sauce I made, and evidently others did too.
If you had to make a horseradish sauce, how would you do it? And, what other things would it be good on/with?