Start by rinsing the pork fillet and remove the membrane skin and fats if there are any. Cut the meat into 2 halves and cut with a knife in small wholes randomly into the meat pieces, so that you can push in 5 whole garlic pods. That's going to season the meat from inside.
Grab a big high pot and throw in the cut Onion, Potato, Garlic and Mushroom pieces. Mix it all well and place the 2 meat halves inbetween. Season with the above mentioned ingredients and cover it all well with oil.
Keep the pot on medium heat for 2 minutes, mixing with the cooking spoon inbetween well.Now pour in the water, liquid cream and mix it carefully all again well. Cover and let it cook for 30 minutes.
After 30 minutes, you just need to take out the meat and cut it into serving size strips and serve hot with the mushroom, potato and the sauce.