Step 1

Mix together the patties ingredients in a mixing bowl.  Then divide the mixture into 6 even patties. Brown the patties in a large skillet over medium high heat for approximately 3 minutes per side. Do not cook the patties all the way through.

Step 2

Place the mushrooms and onions in the bottom of a 6 quart crock pot.  Then place the patties on top.

Step 3

In a mixing bowl, whisk together the brown gravy mix, beef broth, Worcestershire sauce and dijon mustard.  Pour this mixture into the crock pot over the beef.

Step 4

Cover and cook on low for 4-5 hours or on high for 3 hours until the internal temperature reaches 165 degrees F.

Step 5

Remove the patties from the crock pot and set aside.

Step 6

Whisk together the cornstarch and cold water in a small bowl.  Stir this mixture into the crock pot.  Cover and cook on high for 15-20 minutes until the sauce thickens.  Then add the beef patties back to the crock pot.

Step 7

Serve over mashed potatoes and enjoy!