Fry the chorizo in a frying pan over a medium heat until crisp and golden. Set aside and leave to cool slightly.
Meanwhile, cook the pasta according to the packet instructions, then rinse in plenty of cold water and leave to drain in a sieve.
Mix the ingredients for the dressing and season to taste with salt and freshly ground pepper.
Put the pasta, fried chorizo and vegetables (along with the olives and feta) in a bowl and toss well with the dressing. Keep the salad in the fridge until ready to serve.