- 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