Beef Stroganoff is amazingly good. It's even better the next day as leftovers. The beef slow cooks in the slow cooker, resulting in fork tender beef.
Transfer beef to pan of slow cooker. Pour on the sauce. Cook on high for 4 hours, or until beef is tender. (See Note 1)
Whisk sour cream with 1/4 cup of Stroganoff sauce.(See Note 2) Add to Stroganoff mixture; stir until well combined. Heat briefly. Correct seasonings. Garnish with sliced green onion tops. Serve over buttered noodles. Yield: 4 to 6 servings.