Step 1

Start by browning the ground beef in a large skillet over medium heat.  Once halfway browned add the butter, onion and mushrooms.  Continue cooking until the beef is cooked through and the mushrooms are browned.

Step 2

Reduce the heat to low.  Add garlic, thyme and parsley.  Cook for 1 minute; stirring constantly. Sprinkle with flour.  Cook for 1-2 minutes; stirring to combine.  Add the beef broth, Worcestershire sauce and Dijon mustard stirring to combine.

Step 3

Simmer over low heat for 7-10 minutes.  Stir in sour cream and cook for additional 1-2 minutes.  If desired sprinkle with additional parsley.

Step 4

Serve over cooked egg noodles, mashed potatoes or rice.