Salisbury Steak in the Slow Cooker | Scratch Pantry

Ingredients

• 1 pound lean ground beef
• 1 ⁄ 4 cup bread crumbs
• 1 egg
• 2 teaspoons garlic powder
• 2 teaspoons stone-ground mustard
• 2 tablespoons Worcestershire sauce
• salt and pepper , to taste
• 8 ounces mushrooms , sliced
• 1 onion , sliced
• 1 cup beef broth
• 2 tablespoons onion soup mix
• 1 1 ⁄ 2 tablespoons corn starch
• 1 ⁄ 2 cup heavy cream