Grind the mustard seeds in a blender or coffee grinder to the texture of ground pepper. Add the dry mustard and blend well. Add the water and wine and mix until blended. Let stand for 1 - 4 hours or overnight.
Pour the mixture into a food processor and add the remaining ingredients. Process until well blended. Remove to a covered glass container and let stand for 1 - 3 days to develop the flavor. Makes 2 cups. (The mustard can be stored in the refrigerator for a hotter mustard or at room temperature for a mellow flavor; the mustard will keep indefinitely.)