Sourdough Discard Pretzel Bites

Combine the water, discard, sugar, and yeast in the bowl of a stand mixer fitted with the dough hook. Add the flour, butter, and salt and mix on low speed until combined. Continue kneading on low speed (not past 2) for 4-5 minutes, until the dough begins to look smooth. Shape into a ball, cover the bowl with plastic wrap, and let rise in a warm spot until doubled in size - about 1 to 1 ½ hours.
Preheat oven to 450 degrees. Line a baking sheet with parchment paper. Add the water and baking soda to a large pot and bring to a boil. Meanwhile, shape the dough. Turn it out onto an unfloured worksurface and divide into 8 pieces. Roll each piece into a roughly 6-inch rope, and cut into 1-inch pieces. Boil the dough pieces in the boiling water+baking soda for 30 seconds, then remove to the prepared baking sheet using a slotted spoon. Spread them out so they aren't touching, then brush with the egg wash and sprinkle with coarse salt. Bake 13-15 minutes, until golden brown and cooked through. Serve warm.