Beef sour cream mushroom sauce recipe. . . . . simplicity of the beef. . . . . . About This Recipe. A recipe for Beef Medallions With Sour Cream Sauce containing Filet of beef Butter Mushrooms --thin sliced Shallots --minced Red wine vinegar Capers Sour cream Dill . size) tomato sauce . Sour Cream Mushroom Sauce; 2 cups mushrooms, sliced1 pound ground beef; 1 pound ground pork; 2 eggs, beaten; 1 can cream of mushroom soup; Sour Cream Mushroom Sauce (recipe below . Serve with roast beef. You ca... more