1. In a large bowl, stir together the warm water, yeast, and 1 tablespoon of the sugar. Let it sit for 5 to 10 minutes until foamy.

2. Add the remaining sugar, 3 eggs, melted butter, and salt. Mix well.

3. Add the flour gradually, mixing until a dough forms.

4. Knead the dough on a lightly floured surface for 8 to 10 minutes until smooth and elastic.

5. Place the dough in a greased bowl, cover, and let it rise in a warm place for 1 to 1 1/2 hours or until doubled in size.

6. Punch down the dough and divide it into 3 equal pieces. Roll each piece into a long rope.

7. Braid the 3 ropes together, pinch the ends, and tuck them under. Place the loaf on a parchment-lined baking sheet.

8. Cover loosely and let rise again for 30 to 45 minutes until puffy.

9. Preheat the oven to 350°F. Brush the loaf with the beaten egg and sprinkle with sesame seeds or coarse sugar if using.

10. Bake for 28 to 32 minutes until deep golden brown.

11. Cool on a wire rack before slicing and serving.