Here is a simple and delicious mushroom and sour cream sauce recipe that is perfect for noodles:

Ingredients:

500 g of mushrooms (mushrooms, boletus or others to taste)
1 medium bulb
2 tablespoons oil or butter
200 ml sour cream
1 tablespoon of flour
Salt and pepper to taste
Greens (parsley or dill) for decoration.
Preparation:

Preparation of mushrooms and onions:

Wash the mushrooms and cut them into thin slices.
Peel and chop the onion.
Roast:

Heat oil or butter in a skillet over medium heat.
Add the chopped onion and sauté until translucent, about 5 minutes.
Add the mushrooms and continue cooking until they are soft and have released all their moisture, about 10 to 15 minutes.
Preparation of the sauce:

Sprinkle the mushrooms with flour and mix well.
Gradually pour in the sour cream, stirring constantly to avoid lumps.
Continue cooking until sauce thickens, about 5 minutes more.
Seasoning:

Add salt and pepper to taste.
Remove sauce from heat.
Entrance:

Pour the noodles with prepared mushrooms and sour cream sauce.
Garnish with finely chopped vegetables.
Enjoy! I hope you enjoy this recipe.