Made it as written, used small new potatoes. The flavor combination is excellent, I did use more horseradish because we like the sharpness of that and it did not overpower the trout flavor.
Delicious! I didn't have any horseradish, so I used dijon mustard to taste. I'm looking forward to trying it with horseradish soon! I had a lot of extra dressing left-over and will reduce the quantity next time (I like my salads lightly-dressed).
I also changed the mayo to creme fraiche and left out the oil. Absolutely divine! I also LOVE it with fresh dill instead of parsley.
Delicious! I used creme fraiche instead of mayonnaise, left out the olive oil and upped the quantity of horseradish.