So I looked up endless recipes on the internet and they all seemed to be basically the same.
Chop onions, mushrooms and garlic, and saute gently in olive oil and/or butter.
Which I did. Add salt, pepper and herb(s) of choice. I had fresh thyme which I thought would be good. One recipe suggested tarragon which I think would also be nice.
Add white wine or dry sherry or any other alcohol of choice, and reduce.
And that's it. When it's cool blend it. Some recipes suggested serving it warm which I thought was not a good idea. If I want warm mushrooms, they need to be sliced with onions, white wine and parsley.
So chill the pate for a short while before you dish it up, serve it.
Now, I did read about other stuff you can add - cream cheese, cream, yoghurt etc. I didn't really fancy any of those, but I can imagine cream cheese might make an interesting addition, especially for texture/consistency.
I used half a pound of mushrooms and there was loads, and I mean, loads, of pate. Plus, half a large onion/one small one, and one or more cloves of garlic. Two greedy people managed a huge supper and a huge brunch out of it.
Using half the amount of mushrooms would still provide an ample helping. I'm also thinking of adding some black olives to the next version. Didn't see any recipes including those, but I think it would be a good addition for both taste and texture.
Incidentally, serve with lots of fresh lemon, it really needs the lemon to provide that sharp contrast.