1. Place a large pan of water on the hob to boil. Meanwhile, in a bowl combine the chopped tomatoes, garlic, capers, olives, chili, half of the parsley and oil together.
2. Place the spaghetti into the boiling water and once boiling again, allow to cook for 5-6 minutes (a little longer if using dried pasta). Drain the pasta and toss in the bowl with the tomato mix. Season well with salt and pepper.
3. Once served, top with the mozzarella and a good handful of chopped parsley.