One of my goto sauces to have with a meal is a rich creamy Mushroom sauce. Great with most meats.
Simply finely slice at least 200g or 1/2 pound of mushrooms,(slice as many as you want). In a large frying pan, slowly saute in a good lump of butter (add some garlic if it suits) until slightly browned. If you wish as some finely chopped chilli and red bell pepper and saute for a few more minutes). add 150ml of full/Heavy cream, raise the heat until it starts bubble, lower heat to medium and stir often until the creamy consistency you like is reached. take off the heat and let rest for up to 3 mins then serve.