Crush the basil, garlic and pine nuts with a pestle and mortar or puree, add salt to taste. Gradually stir in the olive oil. Stir in the vinegar. Add the chilli pepper and mix well.
Cook the pasta in boiling salted water until al dente, drain and allow to cool slightly. Mix the pasta with the sauce, leave to infuse for approx. 15 mins. Stir in the tomatoes and mozzarella. Fry the Mortadella in a non-stick frying pan, without adding any oil, for approx. 2 mins. until crispy.