Filling and warming - this supper is the perfect mid-week dish!
Preheat the oven to 200°C/fan180°C fan/gas mark 6. Heat the reserved oil in a large saucepan and gently fry the onion and garlic with the chilli flakes until softened. Add the tomatoes and tomato purree, seasoning with salt and pepper to taste. Simmer gently for around 15 minutes until the sauce has thickened (add a little extra water if needed).
At the same time, cook the pasta following the pack instructions, adding the broccoli for the final 3 minutes of the pasta cooking time. Drain and reserve some of the cooking water.
Combine the tomato sauce, pasta, tuna and broccoli; adding some of the reserved cooking water if the mixture is a little thick.
Tip into an ovenproof dish and sprinkle over the grated cheese.
Place in the oven and bake for around 20 minutes until the cheese is golden and bubbling. Serve!