1. Put the yellow mustard powder in a bowl, add some cold water and stir with chopsticks until it is a thick paste.
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2. Seal the bowl with tissue paper, steam it in the cage for about 15 minutes until it goes through. Take it out.
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3, then use chopsticks in one direction quickly stir, make it out of the nose of the spicy, that is, yellow mustard sauce.
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4. Take a sterilized bottle, fill it with the adjusted yellow mustard sauce, and seal it.
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5. Steam for 20 minutes, cool and store.
You want to boil the mustard with boiling water and add the water all at once and then cook it with a lid. It's delicious