2.Cook pasta in a large saucepan of boiling water until tender; drain, reserving ¼ cup cooking water.
3.Meanwhile, heat oil in a large saucepan over high heat; cook garlic and anchovy, stirring, until fragrant. Stir in sauce, olives, oregano, capers and chilli; simmer, uncovered, 5 minutes. Season to taste. Stir in pasta, tuna and the reserved cooking liquid.
4.Spoon mixture into 2-litre (8-cup) ovenproof dish; sprinkle with combined cheeses. Bake, uncovered, 15 minutes or until browned lightly. Serve topped with some extra oregano leaves, if you like.
Any similar-sized pasta shape such as casarecce, rigatoni or penne would be suitable for this dish.