Mix all the things in a meals processor or blender, in batches.
For an additional creamy texture, push the puree via a sieve with the again of a ladle.
Stir in the remainder of the cream. (If getting ready forward cool, cowl and chill for as much as a day.)
To serve, choose over the mushrooms. Wild mushrooms could be gritty so wash them rapidly in a bowl of chilly water then drain nicely and pat dry.
Trim the stalks and chop or slice the mushrooms neatly.