How to substitute for mustard seed<br>Use prepared horseradish to add spice. Prepared horseradish is made by combining ground horseradish with vinegar, and sometimes other spices, to form a sauce. You can get it from your local supermarket.
One of the other spices used to make horseradish is pepper.
( z1 pepper :domain ( z2 pepper :ARG1-of ( z3 include :ARG2 ( z4 pepper :mod ( z5 other ) :ARG1-of ( z6 use :ARG2 ( z7 make :ARG1 ( z8 horseradish ) ) ) ) ) ) )