Easy Mushroom Steak Sauce

This is a simple sauce for grilled or roasted beef that combines the best of mushroom sauces and classic steak sauces.  Dribble any extra over potatoes or rice.  It can be made well ahead of the grilling task, even a day ahead if you'd like to put your feet up while others do the grilling.

Easy Mushroom Steak Sauce
Yield: about 1 1/2 cups

Ingredients
10 ounces Bella mushrooms
1 tablespoon olive oil
salt and pepper
squeeze of lemon juice or splash of sherry vinegar
8-10 ounces beef or chicken broth
1 tablespoon Worcestershire sauce
1/2 teaspoon Dijon mustard
1/2 teaspoon cornstarch
2 ounces cold water

Method

1. Clean and slice mushrooms. 
2. Heat a large skillet over medium high heat and add olive oil and mushrooms.  Add salt and pepper and saute until mushrooms a almost cooked through.
3. Add lemon juice or sherry vinegar and allow to cook down.  
4. Add broth, Worcestershire sauce and Dijon mustard.  Lower heat to simmer and cook mixture 2-3 minutes.
5. In a small cup, stir corn starch into cold water.  Pour into sauce while stirring.  Keep stirring while cornstarch slurry is absorbed and sauce thickens,  Add more water or broth if too thick for your tastes.  Sauce should be thick enough to coat the back of a spoon.  
6. Remove from heat.  Serve immediately or cover and store in refrigerator.  Use within two days.