Cook pasta per packet instructions minus two minutes (it will finish cooking in the oven).
Heat a wok on medium and spray well with 1 kcal spray.
Add the onion, chili and garlic sweating for 2-3 minutes.
Add the pepper, mushrooms and cherry tomatoes.
Season with chili flakes, dried herbs, salt and pepper.
Add the drained tuna and mix well.
Add the passata and stock bringing to a simmer.
Stir in the cooked pasta and pour into a baking dish.
Top with the grated cheese.
Bake in a preheated oven (180 degrees Celsius) for ten minutes until golden and bubbling.