Rub the lightly tenderized steaks well with salt, pepper and thyme, pour in wine and leave them to marinate for 2 hours in the refrigerator. Then drain them carefully and arrange them in a greased baking tray. Sprinkle again with a little salt and pepper.
Top up with some water and put to bake in a moderately hot oven. Every 20 minutes, turn the steaks over, but be careful not to pierce them.
Saute the cleaned and sliced mushrooms until tender in a pot on the stove. Season to taste with some spices. Dissolve the processed cheese in 1 1/2 cups hot water and mix with the mushrooms.