Salisbury Steak

INGREDIENTS

• 1 (10.5 ounce) can condensed French onion soup
• 1 1/2 pounds ground beef
• 1/2 cup dry bread crumbs
• 1 egg
• 1/4 teaspoon salt
• 1/8 teaspoon ground black pepper
• 1 tablespoon all-purpose flour
• 1/4 cup ketchup
• 1/4 cup water
• 1 tablespoon Worcestershire sauce
• 1/2 teaspoon mustard powder