Drain the pasta, sustaining a cupful of the cooking water, and tip the spaghetti into the frying pan. Toss the pasta inside the oil over a low heat, together with a little bit of of the pasta water to emulsify proper right into a sauce that coats the pasta, then fold inside the capers, parsley, tuna and some seasoning. Don’t stir too vigorously – it’s essential to keep larger chunks of tuna. Toss the rocket and lemon juice via the spaghetti, and serve with additional chilli scattered over, while you like.