cut the pork tenderloin into relatively thick pieces
using a meat tenderizer give them a small tap, not too much
sprinkle a little bit of salt and let them rest while you prepare the rest of the ingredients
rinse the brown button mushrooms
remove the stem and cut them into relatively thick pieces
sear the pork in either a big pan or a rondo pot by adding 4 tbsp of avocado oil
sear them on both sides but don't cook them
take them out and switch down the temperature
once the pan has cooled down a bit add the finely diced white onion
add the finely minced cloves of garlic
add the diced brown butter mushrooms
give it a good mix and let it cook until the mushrooms they have released most of their water
deglaze the pan using masala wine
add the chicken stock
add the cream
add the soy sauce not much
add the mustard
bring it up to a simmer and let it reduce a bit before we come with the final ingredients
add some grated gruyere cheese the picant side
add a good round of freshly cracked black pepper
give it a quick stir and nestle the meat in the sauce
turn off the heat and cover it up
put it in a preheated oven running at 180℃ - 356℉
when the pork reaches a core temperature of 59℃ - 138℉ start making the french fries
ready to serve