The Dish: Morton's -- Filet Diane with Demi-Glace Mustard Sauce

General Manager Scott Crain

Demi-Glace Mustard Sauce
1 ½ ounces clarified butter
4 tbsp. fresh garlic, finely chopped
4 ounces red cooking wine
4 ounces Cognac
2 ¾ cups demi-glace (prepared)
2 tsp. Grey Poupon Mustard
2 tsp. Worcestershire sauce
2 tsp. tomato paste
1 1/3 cups heavy cream

Place clarified butter in a small pan over medium-low heat. Add garlic and cook until the garlic is soft, stirring frequently.

Add red wine and cognac to the pan and increase heat to medium. Reduce the mixture until the liquid is almost gone, approximately 6 minutes.

Add demi-glace, mustard, Worcestershire sauce and tomato paste to the pan.

Bring the mixture to a simmer then add the cream. Bring the sauce back to a simmer and reduce for approximately 6-8 minutes. It should be ready as steak is coming off the grill.

Filet Diane
10 ounces filet mignon
½ ounce unsalted butter
4 ounces mushrooms, sliced
3 ounces Filet Diane sauce
1 pinch fresh parsley, chopped
Grill or broil the steak to desired temperature.

When the steak is almost ready, place butter in sauté pan and begin cooking the mushrooms. Sauté the mushrooms for approximately 3 minutes or until cooked, but not browned.

When the mushrooms are cooked, add the sauce into the pan with the mushrooms. To ensure sauce is not over-reduced, do not prepare the sauce too far in advance. If the sauce is too thick, add a little water to correct it.

When the steak is ready, place it in the center of the plate. Pour the finished Steak Diane sauce over the filet and garnish with a sprinkle of chopped parsley.

Morton's
One Exeter Plaza
699 Boylston at Exeter
Boston, MA 02116
Tel: 617-266-5858
Fax: 617-266-9521