Looking for a way to spruce up your McDonald's Filet-O-Fish sandwich? Try one of our hacks that adds ingredients available at ...

Its fried fish sandwich boasts tasty filets served on a toasted roll with lettuce, tomato, and mayo. While you're there, be ...

Stir in tomato paste and cook until it darkens ... Top with remaining bread, gently pressing down to spread out filling. Halve sandwiches and serve.