Wash the tomatoes, dice them finely. Peel garlic and chop finely. Mix both with vinegar and 4 tablespoons of oil. Season with salt and pepper. Cook pasta in 3-4 l boiling salted water (approx. 1 tsp salt per litre) according to package instructions.
Dice the mozzarella. Wash the basil, shake dry and remove the leaves. Fry salami in 1 tbsp. hot oil, drain on kitchen paper. Drain the pasta. Mix with tomatoes, mozzarella and basil.
Season to taste. Crumble the salami and sprinkle over it.