The best recipe for creamy mushroom sauce! Simple and very tasty!

Ingredients:
Mushrooms - 200 g.
Onions - 1/2 pcs.
Vegetable oil for frying
Butter - 10 g.
Meat or vegetable broth - 150 g.
Cream - 100 g.
Oregano - 1/2 pc.
Salt
Black pepper
Parmesan cheese - 15 g.
Parsley
Garlic - 1 clove