Remove the stems from the mushrooms, but they are not discarded, and finely chop (PS some pre-boiled them, but I don't... in General for that matter!)

In a skillet fry the stem of mushrooms, minced meat, you can add onions and sour cream

When the mincemeat is cold, add the grated cheese and stuff the mushrooms themselves this stuffing!!! Then put in the oven for 20-25 minutes and you are done! Suggest to serve with sour cream!!!