Start frying the garlic in the olive oil in a large frying pan until it just begins to change colour.
A few minutes after the garlic has started, pop the pasta into the boiling water and start cooking it.
Once the garlic has changed colour, add to it the tomatoes and olives over low heat; heat the mixture through but don't boil. When the pasta is cooked, drain it and add it to the frying pan. At the last minute before serving, toss in the rocket and mix.