Pasta sauce - is wonderful.
Fry some onions and garlic in butter.
Add the mushrooms and cook for a long time so the water from them evaporates and they get all tender.
Add another knob of butter and let it melt.
Scrape the mushrooms to the side of the pan and add about a tablespoon of flour to make a roux, add some milk and boil to thicken (or miss out the milk and butter stuff and stick in some cream.)
Add chooped parsley if you have it,.
Have left overs on toast fro breakfst tomorrow.