Add water + yeast to flour, add butter, mix. Low speed mix, until dough comes together.
Boost speed to medium 4 to 5 minutes. Dough should be smooth, satiny. Remove dough. Spray non-stick cooking spray in bowl, return dough. Cover with tea towel. Wait 1 hr (in warm place, 70 deg F).
Get 2 baking pans, covered with parchment paper, lightly lubed.
Separate dough into 4.5 oz portions. Spread dough out, then roll out. Roll out to 24 inches. Fold into pretzel shape. Place on pan, cover with tea towel, spritz with water.
Place ten cups boiling water in wide saute pan. Add 2/3 cup baking soda.
Add 1 egg yolk, thinned with 1 tbsp water.
Add pretzels two at a time, add and remove them w/ splatter screen. 30 seconds per pretzel. Sprinkle with pretzel salt.
Bake for 14 minutes at 450 deg F (spin after 7 min).
[[[[[[ Mustard ]]]]]]
Mix 1/4 cup mustard seeds,
1/4 cup dry mustard powder,
2 tsp light brown sugar,
1 tsp Kosher salt,
1/2 tsp Tumeric,
1/4 tsp Paprika,
1/4 tsp. Garlic Powder
Grind mustard seeds in spice grinder. Add rest of dry ingredients, stir.
Add 1/4 cup water, 1/2 cup Cider Vinegar, 1/2 cup sweet pickle juice (from jar of sweet pickles), stir.
Cook in microwave, high, 1 minute. Blend with stick blender or food processor.