Roast the pine nuts in a pan without adding any fat and leave to cool on a plate. Wash the rocket, spin dry and roughly cut into pieces.
For the pesto, puree about 3/4 of the rocket with half of the pine nuts and olive oil using a hand blender to make a pesto. Season with sea salt in between.
Cook the pasta in plenty of salted water until al dente (approx. 6 minutes)
While the pasta is cooking, cut the sun-dried tomatoes into pieces. Sweat the butter and about 8 tablespoons of olive oil (both can be a little more if you like) in a pan with the sun-dried tomatoes. Stir in fig mustard and gorgonzola and season the sauce with salt and pepper.
Add the dripping wet hot pasta to the pan and mix everything loosely.
Serving: Divide the pasta on plates and garnish with two dabs of pesto and arugula.