Put the tuna in a small bowl and pick it apart with a fork. Add the lemon peel, lemon juice, 2 tablespoons of olive oil, basil, a pinch of salt and pepper and let rest for a moment.
In the meantime, heat 2 tablespoons of olive oil in a pan and fry the anchovy fillets in it. Peel the garlic and cut into fine slices, add to the anchovies together with the capers (amount as desired), fry for a few minutes, stirring constantly, then add the tuna mixture and the tomatoes. Let simmer for about 5 minutes.
Strain the pasta and mix immediately with the hot sauce, adding parsley.
If necessary, add a few more shots of olive oil and some pasta cooking water so that the sauce stays nice and fluffy.