Step 1

Heat a skillet over medium heat and add butter.

Step 2

When the butter melts, add mushrooms and onions.

Step 3

Sprinkle mushrooms and onions with about 1/4 teaspoon salt.

Step 4

Sauté mushrooms until they have browned and they have started to cook through.

Step 5

Add red wine and beef broth.

Step 6

Cook for a few additional minutes and allow the sauce to reduce.