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

Add melted butter, salt, and flour gradually, mixing until a dough forms.

Knead the dough on a floured surface for about 8-10 minutes until smooth and elastic.

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

Preheat the oven to 375°F (190°C).

Punch down the risen dough and divide it into 4 equal pieces.

Shape each piece into a ball and flatten slightly. Place on a baking sheet lined with parchment paper.

Cover and let rise for another 30 minutes.

Brush the tops with beaten egg and bake for 15 minutes or until golden brown.

Remove from the oven and let cool on a wire rack.