Since we are exchanging recipes, try Horseradish, Mustard, and Mayo. Equal parts or however you like it. Fantastic on ham sandwiches, never tried it on fries.
Yeah, sounds about right.
Asked one chef how he set up his roast beef sandwiches.
50% mayo - 50% horseradish
I liked it. It was new to me. i always went 100% horseradish.