Salisbury Steak

Bahan-bahan (6 porsi)

• 2 tablespoons salted butter
• 1 medium onion (thinly sliced)
• 4 ounces mushrooms (thinly sliced)
• 1½ pounds lean ground beef
• 1 (15.5 ounce) can condensed beef broth (divided)
• ½ cup Panko bread crumbs
• 1 large egg
• ½ teaspoon garlic powder
• ½ teaspoon black pepper
• 1 tablespoon all-purpose flour
• 2 tablespoons ketchup
• 2 teaspoons Worcestershire sauce
• 1 teaspoon dry mustard powder
• ½ cup water