Grind the mustard seeds to the texture you desire. (There is no ``correct'' texture.) Mix the mustard powder and ground seeds with the water. Let sit for 10 minutes. Add the vinegar and salt; blend well. Refrigerate overnight before us ing. Yields about 1 cup
Ingredients
2 tbsp yellow mustard seeds , coarsely ground
1/4 cup brown or yellow mustard powder
1/4 cup cold water
2 tablespoons white wine vinegar , or cider vinegar
1 teaspoon salt