Mushroom Onion Sauce.

You can have Mushroom Onion Sauce using 10 ingredients and 7 steps. Here is how you cook that.

Ingredients of Mushroom Onion Sauce

1. You need 8 ounces of fresh slice white mushrooms.
2. It's 1 cup of chopped onion.
3. Prepare 2 tablespoons of butter.
4. You need 12 ounces of beef broth.
5. Prepare 1/2 teaspoon of seasoned salt.
6. Prepare 1/2 teaspoon of granulated garlic powder.
7. Prepare 1/2 teaspoon of ground black pepper.
8. Prepare 1/4 cup of beef broth.
9. You need 1 tablespoon of cornstarch.
10. It's 1 teaspoon of red wine vinegar.

Mushroom Onion Sauce instructions

1. Melt the butter and add the onion.
2. Sauté the onion till just tender.
3. Add in the mushrooms.
4. Sauté for 12 minutes add the spices..
5. Stir in the broth..
6. Let simmer for 20 minutes then mix the 1/4 cup of broth with the cornstarch. Add it in stirring constantly till thickened..
7. Serve with what ever you like to eat mushrooms with, steak, mashed potatoes, and so on..