A wonderful change from regular tuna salad sandwich. This is the only way we do it in our house! Note: I didn't notice until March 2010 (took me 8 years) that the ingredient horseradish had somehow defaulted to horseradish sauce. There are many great reviews here from people who used horseradish sauce, so don't be afraid to try it. I have corrected the recipe as it really does call for prepared horseradish, which is much hotter.