Add flour, (start with 3 cups), sugar, salt, egg, water, butter and sprinkle the yeast over it.
Use the dough hook to mix on low speed, until the dough basically comes clean from the side of the bowl. (Add the remaining flour if needed.)
The dough is soft, but not sticky and it’s ready when it comes clean from the side of the bowl. Should take about 4 to 5 minutes.
Prep each muffin well by spraying them with nonstick baking spray.
Cut the dough into 12 equal-sized pieces. Shape each piece into a ball. Cut each ball into thirds.
Place the 3 smaller dough balls in each muffin well.
Preheat the oven to 400 F degrees.
Place the rolls in a warm environment (covered with a clean damp towel). Let the rolls rise while the oven preheats (8 to 10 minutes).
Remove the damp towel and put the pan to the oven. Bake at 400 degrees for 15-20 minutes (or until golden brown on the top).
Remove the muffin pan from the oven and immediately brush the buns with melted butter.
Enjoy!