Sheets of lasagna (if the box says to boil, then boil in salted boiling water for 3 minutes) in my case it was not necessary to boil. Prepare the filling: finely chop chicken fillets...

Mushrooms defrost and boil in salted water for 15-20 minutes. The chicken is fried in a small amount of vegetable oil for 3-5 minutes and add to it the mushrooms, salt, add spices (optional) and fry for another 7-10 minutes.

Prepare sauce: in a pan melt the butter, to it add the flour, fry it and add milk with Italian herbs and dried oregano. Bring to a boil, stirring constantly, once boiling, cook another 2-3 minutes.

The baking form grease with butter (you can use sunflower oil) and begin to lay out layers (I had 16 layers, I divided them into 2 lasagna - 8 layers on each):l ist of lasagne, then stuffed mushrooms with chicken, then sauce and grated mozzarella. And so each layer, the last layer cover with a sheet of lasagne and sprinkle with cheese. Put in preheated oven for 20 minutes.