Fry the mushrooms with onions.. and garlic... add salt. .pepper...dill))))
Mash the potatoes with a fork, add the egg.. stir until smooth.
Cover the baking sheet with greased parchment paper... we put a handful of cheese on the cheese mushrooms (it is very important that then the cheesecakes are easily removed and retain their shape)... and a little more cheese on top.
Fill the pastry bag with potato dough..And spread out on a baking sheet with slides around the mushrooms...you can wrap potatoes around it... you can do this just a few times.