Preheat the oven to 200ºC/400ºF/gas mark 5.
In a medium mixing bowl, stir together the tuna, chopped spring onions,
and cheese. Add the mayonnaise and Folláin Relish and stir to mix.
Spoon the tuna mixture into split buns, dividing it evenly. Wrap each bun
tightly in foil. Place in preheated oven and bake for 15 minutes - or until the
cheese is melted and the filling is hot. Serve immediately.