Okay, I've been craving this for awhile.  And now the weather is cold enough, and I think this may be the most perfect comfort food!  I hope you enjoy it as much as we did!!

6 tbsp butter
1 lb sirloin or tenderloin, cut into 1 inch wide by 2 inch long strips (or beef for stir-fry)
1/3 cup onion, chopped
1/2 lb cremini mushrooms, sliced
1/8 tsp nutmeg
1/2 tsp dry tarragon
1 cup sour cream, at room temperature

  1. Melt 3 tbsp butter in large skillet on medium.  Increase to medium-high and cook beef.  Cook quickly, and you may wish to do in 2 batches.  While cooking, season with salt and pepper and cook until browned.  Remove when done and place on a plate.
  2. In same pan, reduce heat to medium and add onions.  Cook until tender (a couple minutes) and scrape up meat drippings.  Place onions on same plate as beef.
  3. In the same pan, melt additional 3 tbsp butter.  Increase heat to medium-high and add mushrooms.  Add nutmeg and tarragon, and cooking until softened, about 5 minutes.
  4. Reduce heat to low and add sour cream to mushrooms.  To thin sauce, you may wish to add 1 or 2 tbsp of water.  Mix sour cream thoroughly and do not allow it to simmer or boil (cream will curdle).
  5. Stir in beef and onions.  Season with salt and pepper.
  6. Serve immediately with egg noodles.