Shrimps, except for the tail ends, from the shell and remove the black intestine. Wash the chervil, dab dry and chop, except for something to garnish. Mix 1 tablespoon of Pernod, soy sauce and half of the chopped chervil.
Marinate the shrimps in it for about 1 hour. In the meantime, bring the stock, thyme and 5 tablespoons of butter to the boil. Mix polenta and turmeric, stir in slowly and cook for about 5 minutes while stirring. Spread the polenta on a baking tray lined with baking paper to form a rectangle (20x30 cm) and let it cool down.
Roast pine nuts in a pan without fat until golden brown. Whip cream and crème fraîche until stiff and season with remaining Pernod and salt. Cut salmon into cubes of approx. 3 cm. Alternate with mussel meat and prawns on 8 skewers.
Sprinkle skewers with chopped chervil and fry in hot oil at medium heat for 5-6 minutes until golden brown. Season with salt. Put the remaining butter in flakes on the polenta and bake in the preheated oven (electric range: 200 ° C / gas: level 3) for 5-8 minutes.
Cut polenta into rhombs and arrange on plates with the skewers and lemon wedges. Sprinkle with pine nuts and garnish with remaining chervil. Add pernod cream extra.