Butter an ovenproof dish. Clean the mushrooms and cut them into slices.
Leave the bacon in a pan and then remove it. Melt the butter in the pan and stew the mushrooms for 5-8 minutes. Now stir in the port wine and cream. Add the bacon again. Put everything in the ovenproof dish and sprinkle with cheese.
Baked at 200 ° C in a preheated oven for approx. 15 minutes until golden yellow.