This traditional mustard packs a punch with the addition of horseradish creating a truly distinctive condiment to enliven roast dinners and cold meats adding heat and depth to dishes this mustard with horseradish makes a fiery partner to a plate of roast beef but can also be used to add a flourish to cheese sauces or smoked fish alternatively add a spoonful to some cregraveme fraiche for an indulgent topping for jacket potatoes