Cozy Slow Cooker Salisbury Steak Meatballs Recipe - Dave's Grill

Ingredients

• 1 pound (454 grams) ground beef
• ½ cup breadcrumbs
• 1 egg
• ¼ cup (59 milliliters) milk
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 teaspoon Worcestershire sauce
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 2 cups (473 milliliters) beef broth
• 1 tablespoon Worcestershire sauce
• 1 tablespoon ketchup
• 1 teaspoon Dijon mustard
• 1 tablespoon cornstarch (mixed with 2 tablespoons water to form a slurry)
• 1 small onion, sliced
• 1 cup mushrooms, sliced
• Salt and pepper, to taste