Horseradish Sauce for Prime Rib

Here is a nice twist to Horseradish sauce:

1/2 cup sour cream
1/2 cup mayo
2 Tbsp horseradish (I use more-to taste)
2 Tbsp capers
1 tsp sugar
1 tsp liquid from capers
Mix and chill, goes well with Ham also.
I don't know who's recipe this is, can't give credit.
Jim

Thanks Jim perfect timing,

I'm making a Standing Rib Roast in the WSM on Saturday and was looking for a good horseradish sauce. Couldn't look past $3.99 a lb for some very nice choice roasts at the local grocery store. I'm still trying to decide between the recipie for the Montreal or the Herb Crusted. I've done a variant of the herb crusted several times on the kettle from the Weber Big Book of Grilling (I think the only real difference is the Lawry's Seasoned salt) It was a real hit. Any thoughts on Prime Rib recipies on the WSM anyone??

The Sauce was a real hit Jim, Thanks again