Warm the water until lukewarm. So if you put your finger in, you can put it in but not keep it there more than few seconds.

Take off heat, mix in sugar and sprinkle yeast on top. Let this rest until it turns frothy. (blooming of yeast).

In a large bowl, stir together the flour and salt.

Add the butter and bloomed mixture. Mix until it comes together into a dough.

On a floured surface, knead this for 8 to 10 minutes until a smooth sticky  dough is formed

Place in a lightly oiled bowl. Cover and let it rest for an hour or until doubled. This is the first proofing.

After the rest, knock out the air from the dough. Divide into 8 sections and roll each into a ball. Place on a floured or parchment lined baking pan. For better shapes , you can make strips of parchment about 3 inches high and tape them into rings (diameter of the rings should be how big you want your burgers to be. Place these rings on your pan and place the dough balls inside.

Cover and keep aside for half hour. This is the second proofing.

Meanwhile , preheat your oven to 200 c or 400 F

Brush the two tablespoons milk or water on top . Sprinkle sesame seeds if using.

Bake for 12 to 15 minutes until well browned on top.

Remove and cool on a wire rack.