A food enthusiast's recipe hack could transform your tuna sarnie. By swapping out mayonnaise for another ingredient, you get a creamier, protein-packed lunch that's healthier than the classic version

Tuna mayo sandwiches are a classic option but there's a simple trick to make them even better.

A food enthusiast's recipe hack could transform your tuna sarnie. By swapping out mayonnaise for another ingredient, you get a creamier, protein-packed lunch that's healthier than…