Slow Cooker Continental Beef

Ingredients

1 cup onion ( diced )
6 tablespoons butter ( or light margarine )
2 pounds beef rump roast ( cut into cubes )
8 ounces tomato sauce 

1 can diced tomatoes

1 cup chopped mushrooms

1 bell peppper- chopped, optional
2 teaspoons worcestershire sauce
1 tablespoon sufar
2 teaspoons paprika
2 teaspoons salt
1/2 teaspoon black pepper
2 teaspoons garlic ( minced )
1 cup low fat sour cream

Directions

Optional:

Saute onions in butter. Remove from pan and brown beef cubes. 

 Place beef, onions, tomato sauce, Worcestershire, sugar, paprika, salt, pepper and garlic in slow cooker. Cook on low 6-8 hours or until beef is very tender. Add sour cream to beef mixture just before serving. Stir until smooth and heated through. Do not boil. Serve over cooked egg noodles.