Remove the legs and part of the pulp from the mushrooms (it is convenient to use a Noisette, but you can also use a spoon). Do not use the legs, and chop the pulp with a knife.
Finely chop the onion and fry it until Golden brown.
Add chopped mushrooms.
Fry for 2-3 minutes.
Add the shredded chicken breast and stir.
Fry for another 3 minutes.
Add the crushed canned pineapples and mix.
Warm up for 1 min.
Pour in the cream, stir and heat for 2 minutes.
Turn off the heat and cool slightly.
Fill the mushroom caps with minced meat.
Put the mushrooms in a form slightly greased with vegetable oil.
Spread the grated cheese on top, pressing it down.
Send to a preheated 180*C oven for 10-15 minutes.