In a large mixing bowl, dissolve the active dry yeast and sugar in warm water. Let it sit for about 5-10 minutes until it becomes frothy.
Add the melted butter, salt, and egg to the yeast mixture and stir well.
Gradually add the flour to the mixture, one cup at a time, stirring until the dough starts to come together.
Once the dough is formed, turn it out onto a floured surface and knead for about 5-7 minutes until smooth and elastic.
Place the dough in a greased bowl, cover it with a clean kitchen towel, and let it rise in a warm place for about 1 hour or until it has doubled in size.
Preheat your oven to 375°F (190°C).
Once the dough has risen, punch it down and divide it into 12 equal pieces. Shape each piece into a ball and arrange them in rows on a greased baking sheet.
Cover the rolls with the kitchen towel again and let them rise for another 30 minutes.
Bake the rolls in the preheated oven for 20 minutes, or until they are golden brown.
Remove from the oven and let cool slightly before serving.