In a mixing bowl, combine warm water, sugar, and yeast. Let it sit for 5 minutes until frothy.

Add flour and salt to the yeast mixture. Mix until a dough forms.

Knead the dough on a floured surface for about 5-7 minutes until smooth.

Place the dough in a greased bowl, cover, and let it rise in a warm place for 1 hour or until doubled in size.

Preheat the oven to 425°F (220°C).

Once risen, punch down the dough and divide it into 4 equal pieces.

Shape each piece into a ball and place on a baking sheet lined with parchment paper.

Boil a large pot of water and add baking soda. Carefully drop each dough ball into the water for 30 seconds, then remove and place back on the baking sheet.

Brush each ball with beaten egg and sprinkle with coarse sea salt.

Bake in the preheated oven for 20-25 minutes until golden brown.

Remove from the oven and brush with melted butter while warm.

Let cool slightly before cutting the tops off to create bowls.