Put a pan of salted water for the pasta on a medium heat.
Heat 4 tbsp of olive oil over a medium low heat. Add the garlic and slowly cook until softened but not caught.
Add the dried crumbled chilis and tomatoes and simmer for 5 minutes.
Add the tuna chunks and simmer for another 5 minutes until the tuna is nearly cooked through.
Add the olives and capers and simmer for 1 minute. Check for seasoning and remove from the heat. Set to one side while the pasta cooks.
Cook the pasta according to the packet instructions until al dente. Drain with a slotted spoon straight from the pasta pan into the sauce. Add the mozzarella and mix well.
Serve with garlic bread, and a side salad or other greens.