Par Cook the beef
Season each side of the filet and let it cook 5 min on each side. Then stick it in the oven for 15 minutes.
Prepare THE FILLING
Dice the mushrooms and mince the garlic, before adding to a skillet. Stir in the seasonings and let it cook down for about 5 minutes.
prepare the beef
Slice up the beef filet into 1/4" pieces.
PREPARE THE PASTRY SHEETS
Open the pastry sheets and roll it out so it's a bit longer, about an "1 on each side. Then cut them into 10 even rectangles.
fill the pastry
Brush an egg wash over each piece of puff pastry before placing a piece of beef and some mushroom filling over top.
Seal the pastry
Close the pastry around the beef mixture to enclose it and use a fork to seal the sides.
seal the pastries
Close the pastry around the beef mixture to enclose it and use a fork to seal the sides. Brush the egg wash over before baking.