In a quart mason jar, combine all ingredients, cover, and let sit overnight. Be careful pour in the beer, it will foam up a lot at first, just let it settle down when putting other ingredients in.
Next day, prepare water bath canner, equipment, and 5- 4oz jelly jars with lids and rings.
Pour entire mason jar into a blender. Blend until smooth with a little bits of the whole seeds still showing.
Transfer mustard to a large sauce pot and heat up.
Ladle in hot mustard into hot jars. Leave ½ inch headspace, wipe rims, place on lids and rings, and process for 10 minutes.
Take out and let cool and seal.
Let mustard sit for a few weeks before opening. This will help mellow out the flavors and not be so bitter.