Beef Patties with Mustard Cream Sauce

Yield: 6 servings

2 pounds ground beef
1 tablespoon butter
1 tablespoon olive oil
2 green onions, chopped
2 garlic cloves, minced
1/4 pound mushrooms, sliced
Salt and pepper, to taste

Mustard Cream Sauce
2/3 cup white wine
2 tablespoons Dijon mustard
2/3 cup heavy cream
2 tomatoes, peeled and chopped
2 tablespoons capers

Shape beef into 6 oval patties. Melt butter in large skillet and add oil. Heat until foaming. Add green onions and saut