Homemade Soft Pretzels

and 1/2 cups (360ml) warm water (lukewarm, no need to take temperature)

packet active dry or instant yeast (2 and 1/4 teaspoons)

salt

granulated sugar

(480-530g) all-purpose flour + more for work surface (or mix of whole wheat flour and all-purpose flour)

large egg, beaten

coarse sea salt for sprinkling