Cook the noodles in plenty of boiling salted water until they are firm to the bite.
Wash the lemon with hot water, dry it and rub off 1 teaspoon of the zest. Squeeze out 4 tablespoons of juice. Bring the cream and lemon juice to the boil in a large pan. In the meantime, dice the salmon 3 cm. Season the cream with salt, cayenne pepper and a little sugar. Remove the pan from the heat, add the lemon peel and salmon and cover and let stand for 5 minutes. Turn once. Add the peas to the pasta 1 minute before the end of the cooking time. Then drain and mix into the lemon and salmon sauce while dripping wet.