Instructions:
Prepare the Patties:
In a large bowl, combine ground beef, egg, minced onion, breadcrumbs, garlic, salt, and pepper. Mix gently until just combined—avoid overworking the meat.
Shape into 4-6 patties, about ¾-inch thick.
Sear the Patties (Optional but Recommended):
Heat a skillet over medium-high heat. Sear patties for 2-3 minutes per side until browned. This step locks in flavor!
Layer in the Slow Cooker:
Spread sliced onions and mushrooms evenly across the bottom of the slow cooker.
Place the seared patties on top.
Make the Gravy Base:
In a bowl, whisk together beef broth, gravy mix, ketchup, and Dijon mustard (if using). Pour over the patties and vegetables.
Cook Low & Slow:
Cover and cook on LOW for 5 hours (or HIGH for 3 hours) until patties are tender.
Thicken the Gravy:
Remove patties and set aside. Switch the slow cooker to HIGH.
Whisk cornstarch with 2 tbsp cold water, then stir into the gravy. Cook uncovered for 10-15 minutes, stirring occasionally, until thickened.
Serve & Enjoy:
Return patties to the slow cooker, coating them in the rich gravy.
Serve hot over mashed potatoes, egg noodles, or rice. Garnish with fresh parsley if desired.
ADVERTISEMENT
