My husband just found out he's allergic to mustard. Are there any substitutes for it? It's a staples in my kitchen and he loves it.
Edit for clarification (was in the original question):
Husband is also allergic to horseradish and egg whites, so substituting horseradish for mustard is not an option.
Fermented vegetables can often provide the pungent, salty kick that is often desired from mustard. If he is not allergic to cabbage (which is a member of the same family, brassica), sauerkraut may be a good option. Similarly, other members of the brassica family, such as broccoli and collard greens, retain a similar bite, particularly when raw. You might try making a collard green pesto.
Outside the brassica family, tamarinds can deliver a pungent, sour flavor that complements many different kinds of foods. Tamarind is a signature ingredient in many sauces and chutneys, particularly for meat. You could try making your own A1 sauce while leaving out the mustard.
The only thing that even closely resembles mustard that I can think of would be Horseradish and real wasabi.
