Cut the onion into rings on the floor and fry until golden in vegetable oil.
Dice the mushrooms and add to the onion, cook until all the juice from the mushrooms evaporates. Put everything in a bowl and add finely chopped eggs and grated cheese to the onion and mushrooms. Mix well and season to taste.
Cut the pork across the fibers into pieces about 7-8 mm thick. Salt and pepper the meat on both sides and beat well with a kitchen hammer as for a chop. Lay out the filling and roll it into a roll, fasten the edges with toothpicks, or with threads.
Fry the pork rolls on all sides in vegetable oil until golden brown. Pull out all toothpicks after frying or remove threads.
Put the fried rolls in a baking dish. Pour about 1.5 cups of water and cream into the mold. Season with spices and salt to taste and place in an oven preheated to 190 ° C.
Bake pork rolls with mushrooms for 30 minutes.