Marinate beef at least one hour.
Sauté onions, garlic and Mushrooms. Remove from pan.
Sauté beef in hot pan in two batches. Return mushrooms to pan. Deglaze with wine. Add stock, mustard and herbs.
Combine cornstarch and water. Thicken with cornstarch slurry. Stir in sour cream.
Cook egg noodles 10 minutes. Drain.
Drop broccoli in pot of boiling water for 5 to 6 minutes.Makes 4 Source: