Step 1

In a bowl, mix the beef, egg, breadcrumbs, garlic powder, onion soup mix, and onions. Mix together until incorporated.

Step 2

Measure the mixture in ½ C amounts, and form into patties. Fry in a pan until browned on both sides.

Step 3

Carefully stack in the slow cooker. In a container, mix the gravy mix, water and mushrooms. Pour on top of the patties and cover.

Step 4

Cook on low for 5 – 6 hours.

Step 5

After cook time is complete, remove the patties from the cooker, and make a slurry of the cornstarch with 1 tbsp of water. Pour into the cooker and mix well.

Step 6

Return patties to the mixture and cook for an extra ½ hour for the sauce to thicken.

Step 7

Serve with rice or mashed potatoes.