Cut the buns in halves and soak them in milk.
Mix the cheese with the egg, salt, pepper and dill into a paste.
Spread the cheese paste over every bun halves.
Put the halves back together as if you’d make a burger.
Divide the butter into 12 pieces. Place 1 piece on the oven tray, for each of the 6 buns, and then another cube over the bun.
So, one piece of butter under the bun and another on top.
Add a tsp of sour cream on top of each cheese bun too.
Cook in the oven for 10 minutes, or until the cheese melts well.
Serve the cheesy buns hot.