Primarily, prepare the raw ingredients for cooking
Then, measure them accurately using proper measuring equipment
After that start cooking
First, sauté the chopped onion and minced garlic
Add mushrooms and fry for 5 minutes.
Then, add chicken vegetable or chicken broth and cook for 5 minutes
After that add creams, Dijon mustard and simmer for 5 minutes at low temperature
Then season the sauce with salt, black pepper, parsley, grated parmesan cheese
Now, taste the sauce and adjust seasoning according to your taste
Garnish and serve