Cook the pasta in boiling salted water.
While the pasta is cooking, heat half the oil in a large frying pan and, when hot, add the garlic, half the parsley, the capers and lemon rind. Cook for a minute or two and then stir in the tuna, salt and pepper. Cook for a further 2 minutes, breaking up the tuna as much as you can with a fork.
When the pasta is ready, drain and transfer i