Creating Slow Cooker Salisbury Steak is straightforward if you follow these simple steps:

1. Mix Ingredients: In a large bowl, combine ground beef, bread crumbs, egg, chopped onion, minced garlic, Worcestershire sauce, salt, and black pepper. Mix until well blended.
2. Form Patties: Shape the mixture into 4 to 6 patties, depending on your preferred size.
3. Sear Patties: In a skillet, heat olive oil over medium heat. Sear each patty for 3-4 minutes on each side until browned. This step adds flavor but can be skipped if you’re short on time.
4. Prepare Slow Cooker: Place the seared patties in the slow cooker.
5. Mix Gravy: In a separate bowl, whisk together beef broth and brown gravy mix until smooth.
6. Add Mushrooms: Pour the gravy mixture over the patties and top with sliced mushrooms.
7. Cook: Cover the slow cooker and cook on low for 6 to 8 hours or on high for 3 to 4 hours.
8. Serve: Once cooked, check the patties for doneness. They should be tender and infused with flavor.
9. Garnish: If desired, sprinkle fresh parsley on top before serving.

These steps will guide you in creating this incredible meal effortlessly.