Mix vinegar to milk and set aside for 5 minutes until it curdles.

In a bowl mix together flour, salt, sugar and instant yeast.

Add the curdled milk to the flour mix and mix until incorporated.

It may look dry but after adding butter it will be perfect.

Add unsalted butter and knead the dough The dough will be quite loose.

Take it on counter and with the help of a dough scraper, knead it for 3-4 minutes.

Keep the dough in an oiled bowl, cover with cling wrap and set aside until it doubles.

Preheat oven to 200°C.

Take the dough to the counter, divide it into six equal portions. Shape each portion into a tight ball.

Arrange them on a greased tray.

Cover with a towel and set it aside for 15 - 20 minutes.

milk ya beat egg apply it on the buns using a brush.

Sprinkle sesame seeds.

Bake in the oven for 20 - 25 minutes until evenly browned on top.

Cool on wire rack and use it.