Oil an oven-safe dish with some olive oil (or the pasta and cheese will stick). Turn oven on to 170 degrees. Boil water and start cooking pasta
Meanwhile, use a medium saucepan to simmer the chopped tomatoes and olive oil briefly (3 mins) to make the sauce - don't break up the tomato pieces. Add half the grated parmesan to the sauce and stir.
Chop up the mozzarella into cubes, tear up or chop basil leaves. When pasta is al dente drain it. At the last minute, add basil to the sauce and mix the mozzerella and the pasta into the pan with the sauce in it. Pour into oiled dish and sprinkle more parmesan on top. Put into oven until top is crispy - about 10 minutes, but keep an eye on it as it can get too dry very easily.
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