Preheat the oven to 425°F. Line a large baking sheet with a silicone baking mat or parchment paper.
Using a knife or pizza cutter, cut each biscuit into 4 pieces and roll each piece into a ball. Use a knife to make a small slit in the top of each ball of dough.
Pour the water into a medium pot and whisk the baking soda in until it has dissolved. Cook on low heat.
Using a ladle or metal spoon, carefully tip each dough ball into the baking soda water for about one minute before placing on the baking sheet (slit-side up).
Brush the dough balls with the melted butter or an egg wash and immediately sprinkle with coarse salt if desired.
Bake for 8 to 9 minutes or until deep golden brown. Serve warm.
