Pastry is the name given to various kinds of baked goods constructed from components similar to flour, butter, shortening, baking powder or eggs. Finely chop the mushrooms and fry in a scorching pan with a little olive oil, the thyme leaves and some seasoning. When the mushrooms begin to launch their juices, proceed to cook dinner over a excessive warmth for about 10 minutes until all the surplus moisture has evaporated and you might be left with a mushroom paste (often called a duxelle). Remove the duxelle from the pan and depart to cool.
Fastidiously invert coated tenderloin into middle of puff pastry, mushroom-aspect down. Unfold one other layer of mousse on prime and sides of tenderloin. Unfold remaining mushrooms over prime. Fold up lengthy sides of dough to surround tenderloin, brushing edges with beaten egg to seal. Trim ends if needed, then fold up, and seal. Carefully transfer tenderloin, …