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What exactly all these and how to use ?

It is Mushroom Pâté... I use it for everything from toast, to a wellington... it's delicious..

Yessss. Mushroom pâté is the best!
I made some with creminis a long time ago and it turned out really good. I should try to make it again with some wild foraged mushies this year.

Oh yes, standing on some warm granary bread