Instructions: Place mustard seeds in a glass jar. Warm vinegar gently in small saucepan, pour over mustard seeds, seal; stand in a cool, dark place. Allow to steep for 2 weeks. Blend mustard in a food processor until smooth, or pound using a mortar and pestle, sieve mustard. Pour into sterilised jars, seal; refrigerate until required.

Makes about 1 1/2 cups.

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