Not quite what you were thinking but one I have in my to try pile (my DH loves horseradish in everything!)...and it got good reviews...
Horseradish and Sour Cream Mashed Potatoes
Grandma Pam to 3
“Other creatures receive food simply as fodder. But we take the raw materials of the earth and work with them—touch them, manipulate them, taste them, glory in their heady smells and colors, and then, through a bit of alchemy, transform them into delicious creations.”
― Judith Jones, The Tenth Muse: My Life in Food