Prepare a rectangle baking tray. Grease it well and set aside.
Add yeast to a large mixing bowl. Add the milk and mix with a spoon until the yeast is dissolved.
Add the egg, sugar, flour and salt. Knead on medium speed for 2 minutes (with a hook attachment). The dough should come together into a ball.
Cut the butter and add to the dough. Continue to knead until the butter gets fully incorporated and the dough turns stretchy. This should take approximately 7 to 8 minutes at medium-high speed.
Turn the dough onto a working space. The dough will be sligthly sticky at this stage. For easier handling, dust your workspace with some flour. Form the dough into a ball and place it in a large bowl.
Cover the bowl with a kitchen towel or cling wrap and place it is a warm place to proof. This should take approximately 1 hour depending on the surrounding temperature. The dough should almost triple in size.
Press the proofed dough to release air bubbles.
Turn it onto a lightly floured surface. Divide it into 6 equal sections.
Shape each piece into a round ball. Place the rolls on the prepared baking tray. Place them well apart to allow space for rising.
Cover the shaped rolls with a kitchen towel and let them proof until slightly more than double in size.
Bake the yeast rolls at 165°Celcius for 20 minutes until the top of the buns have turned brown.
Once baked, remove the rolls from the oven and brush the top of each roll with melted butter.