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.
There is no way to replace mustard seed in a reciple
( z1 possible :polarity - :ARG1 ( z2 replace :ARG1 ( z3 seed :mod ( z4 mustard ) ) :ARG2 ( z5 seed :mod ( z6 mustard ) ) :manner ( z7 principle ) ) )