Slow Cooker Salisbury Steak with Gravy for 6

Instructions:

1. Combine the ground beef, breadcrumbs, egg, half of the onion soup mix, garlic powder, black pepper, and Worcestershire sauce in a large bowl.
2. Shape the mixture into 6 oval patties, roughly 2 cm thick.
3. Heat oil in your skillet over medium high heat and brown the patties for 3 minutes per side until a dark brown crust forms.
4. Place the sliced onions and half of the mushrooms at the bottom of the slow cooker.
5. Lay the seared patties on top of the onion and mushroom layer.
6. Whisk the beef broth, minced garlic, and the remaining onion soup mix together, then pour it over the patties.
7. Scatter the rest of the mushrooms over the top.
8. Cover and cook on Low for 6 hours until the meat is tender and the onions are translucent.
9. In a small jar, shake the cornstarch and cold water until no lumps remain.
10. Stir the slurry into the slow cooker liquid, turn to High for 15 minutes until the sauce becomes velvety and coats a spoon.