Lisas' Hot Italian Meatball Sandwiches

• 6 submarine sandwich rolls
• 1 egg
• 1 italian seasoning
• 475 ml your favorite pizza sauce
• 450 gr good quality beef (ground)
• 130 gr pork (ground)
• 120 gr block mozarella cheese
• 75 gr cornflake crumbs
• 60 ml evaporated milk
• 16 gr onion flakes (dried)