2 tbsp. green onions, if desired
1 cup sour cream
3 tbsp. Dijon mustard
3 cups beef stock
2 tbsp. flour
1 medium yellow onion, sliced thin
1/2 pound mushrooms, sliced
salt and pepper, to taste
1 pound beef (sirloin, skirt steak or tenderloin tips), cut in thin strips
1/2 cup vegetable oil
8 oz. Egg Noodles Extra Wide