For the pesto, roast pine nuts in a pan without fat until golden brown. Let it cool down. Sort the spinach, wash and shake dry. Chop the spinach coarsely. Peel garlic and chop coarsely. Grate 30 g Parmesan finely.
Chop the rest of the parmesan into shavings.
Puree pine nuts, except for 1 tablespoon, spinach, garlic, grated Parmesan cheese and 6 tablespoons of olive oil in a universal chopper or with a hand blender. Season to taste with salt and pepper. Cook the pasta in 3-4 l boiling salted water (approx. 1 tsp salt per litre) according to the instructions on the packet.
Meanwhile, for the Cajun spice mixture, grind cayenne pepper, peppercorns, thyme, oregano, paprika and sea salt finely in a mortar (see tip on the right) or wrap the spices in a freezer bag and roll them over several times with the dough roll.
Rinse the prawns, dab dry and mix with 2 tablespoons of olive oil. Turn prawns all around in a part of the spice mixture. Store the rest of the mixture in a screw-top jar.
Heat 1 teaspoon of oil in a large coated frying pan. Fry the prawns for 3-4 minutes while turning. Drain the noodles, collect some noodle water and measure about 100 ml. Put the noodles back into the pan with the pasta water.
Stir in the pesto. Arrange pasta on plates. Arrange prawns on top. Serve sprinkled with pine nuts and Parmesan shavings.