I made one by melting butter, adding flax flour and black pepper, cook until thick and then thin to the required consistency with cream. Add grated cheese. Hope this helps.
I make a mean stilton and mushroom sauce even if I say so myself.
Take a teaspoon of butter and melt in a non stick pan. Add baby button mushrooms (I prefer them whole and generally I use the tinned variety) and fry off until browned.
Add the required amount of cream and crumble in some stilton.
I also add 1/4 teaspoon of garlic granuals or 1 garlic clove grated.
Slowly heat until required consistency is achieved.