Mash the potatoes, then mix with mozzarella, flour, butter, herbs and seasonings.
Divide into 4 and flatten onto a lined baking tray. Prick the centres with a fork.
Bake at 200°C / 390°F for 18 to 20 minutes until golden.
Cook the garlic in the oils, then add tuna and tomato sauce and cook for 2 to 3 minutes.
Top each flatbread with the tuna mixture, a fried egg, red onion, herbs and a squeeze of lime.
