Step 1: Pre-heat oven to 180c
Step 2: Bring pasta to the boil, then cook for 12 mins.
Step 3: When cooked, drain and stir in the tins of tuna. Stir in 5 tablesppons of mayonnaise, and the chopped spring onions.
Step 4: Pour into an overnproof dish, then cover with the grated cheese, cheese and onion crisps and mixed herbs.
Step 5: Bake for 10 mins until cheese is golden brown.
Step 6: Serve on its own or with cheesy garlic bread.