Marinate minced pork with sesame oil, pepper and some dark soy sauce. Set aside for 10 minutes!
Stir fry onion and garlic in oil. Then cook the marinated minced pork and add button mushrooms. Once done, set aside.
In the hot pan, melt butter. Add in (all purpose) flour and stir. Then pour in fresh milk (and some water). Add some shredded cheese and let it come to a simmer. Add in cream cheese and stir in the cooked pork plus mushrooms. Let it come to a boil. If you want a thicker sauce, add some cornflour water.