3 oz Mustard powder
2 Heaped tablespoons grated horseradish (fresh or bottled)
1 teaspoon Salt
2 Fluid ounces olive or vegetable oil
4 Fluid ounces white wine vinegar
1 tablespoon Honey
1 tablespoon Lemon juice
Put all the ingredients in a blender or food processor. Blend about 30 seconds, or until the mustard is smooth and the horseradish hardly visible. Pour into small jars or pots and cap tightly. Keep for at least a week before using.
NOTE:
Horseradish mustard is good with roast beef or smoked fish and also good mixed with sour cream or mayonnaise