Tuna mayo makes a brilliant sarnie filling or jacket potato topping, but it can feel quite heavy on the stomach. Whilst mayonnaise gives tuna a lovely creamy texture, it can also make it greasy and pile on the calories, which might put you off your favourite filling, reports the Express . But Yumna Jawad, a chef and founder of Feel Good Foodie , has revealed there's a simple trick to lighten up tuna salad whilst making it even more delicious. Yumna explained: "I use Greek yoghurt rather than