Saute finely diced onions in olive oil.
Add lots of sliced mushrooms.
Black Pepper
Add garlic.
Add ground turkey/beef, cook until browned

Add enough beef stock to cover meat vegetables. Add bay leaf. (Can also add some type of red wine at this point.)
Let simmer for 20-30 minutes?
Add powdered gravy mix to thicken sauce or use flour.

Just before finished add about 1 TBSP of dijon mustard, about 1/4 cup heavy cream, and about 1/2 cup of sour cream. Heat through but don't let it get back up to a boil again.

Serve over buttered egg noodles.