|Mustard seeds sitting in beer.|
1/4 C brown mustard seeds
1/4 C yellow mustard seeds
3/4 C flat amber beer (or beer of your choice)
1 Tbsp mustard flour
1 Tbsp dried minced onion
2 tsp dried thyme leaves
1/2 C cider vinegar
1 teaspoon salt
Put the mustard seeds in a small bowl and pour in the flat beer (make sure your bowl is not aluminum). Cover with plastic wrap and let sit overnight (or about 8 hours).
When you're ready to make the mustard, mix in the mustard flour, onion, and thyme and let sit for 15-20 minutes.
Pour the mustard seed mixture into a blender or food processor and add the vinegar and salt. Blend or process until the mixture becomes a paste with a some seeds still visible. Transfer to a glass jar, cover tightly with a lid and let sit for 4-5 days. (Don't taste the mustard right after mixing--it will have way too much vinegar taste. I promise the flavors will blend after a few days.)