Iron Chef returns

Secret ingredient: horseradish.

With Aaron, Jai, and Richie as the judges...

Rick's dish prevailed (my description from what I remember):
Baked salmon with a mustard and horseradish glaze
Risotto and a hint of horseradish
Sauteed spinach, mushroom and horseradish
Bruschetta with fresh tomatoes, basil, olive oil, and horseradish