Steak Au Four

Roast the potatoes with salt, pepper, and a little butter until browned at the edges.

Sear the steaks quickly in a hot ovenproof pan, then transfer them to a plate.

Cook onion and mushrooms in the same pan until browned, then add stock, cream, mustard, and pepper.

Return the steaks and potatoes to the pan and finish in the oven until the beef reaches the desired doneness.

Rest briefly, slice the steaks, and spoon mushroom cream sauce over the top with parsley.