Boil pasta until al dente then remove from heat
Hard boil eggs
Heat oil in a large pan and cook onions, pepper, courgette, sweetcorn until they begin to soften
Add tuna, celery, mushrooms, paprika, fennel, salt and pepper
Add pasta, tomatoes and passata and stir mixture well
Cook gently for about 10-15 mins to heat thoroughly
Cut eggs into quarters and place on the base of a large casserole tray
Cover with tuna/pasta mixture
Cover with cheese, cherry tomatoes and spring onions
Place in a hot oven/grill until cheese melts
Serve