quizno: My mother is obsessed with the Quizno's horseradish sauce. Of course this is probably some "secret recipe" thing, but I'm more wondering if anyone knows how to make something similar?|||They probably buy it from their food service provider. There are many varieties of horseradish sauce on the market. Try a few and see if you find one that suits you. They are usually in the same aisle as mayo, mustards, and other condiments. The easiest thing would be to buy some prepared horseradish and mix some with your favorite mayo or Miracle Whip. taste it and see if thats what you are looking for.|||It's basically horse radish and mayonnaise. The difference is artificial horse radish. The secret to most such sauces is a high level of fat, which people can then add to their local sandwoch.|||2 teaspoons Honey Mustard, 2 teaspoons mayo, 1 teaspoon horseradish and a teaspoon honey.|||I find that a blend of Mayo and sour cream or Greek style yogurt and horseradish makes an awesome sauce, I love it on beef sandwiches.