Pretzel Baguette with Mustard Butter

INGREDIENTS

1 1/2 cups

warm water, (110-115 degrees)

2 tsp

active dry yeast

2 tsp

sugar

4 1/2 cups

all purpose flour

2 tsp

kosher salt

4 tbsp

butter, (melted)

1/4 cup

baking soda

whole egg, (lightly beaten)

Kosher salt for sprinkling, (use pretzel salt if you have it)

4 tbsp

butter, (room temperature)

2 tbsp

grain mustard or stone ground mustard