Slow Cooker Mushroom Salisbury Steak

• 1 ½ pounds lean ground beef
• 1 egg yolk
• ¼ cup minced onion
• ⅓ cup Panko bread crumbs
• 3 tablespoons milk
• 1 clove garlic minced
• ¾ teaspoon salt
• ¼ teaspoon black pepper

Instructions:

1. Place mushrooms and onions in the bottom of your slow cooker.
2. Combine beef patty ingredients and form 6 patties. Brown over medium high heat (about 3 minutes per side).
3. Layer beef patties over mushrooms. Combine remaining ingredients except water and cornstarch. Pour over beef and cook on low 5 hours.
4. Once cooked, remove patties and set aside.
5. Turn slow cooker onto high. Combine cold water and cornstarch. Stir into the broth and let cook a few minutes until thickened. Add beef back into the sauce to coat.
6. Serve over mashed potatoes or rice.