Wash the salmon, dab dry, cut into large pieces and sprinkle with 2 tablespoons of lemon juice. Clean and wash the mangetouts and cut them lengthwise into strips. Put pasta in boiling salted water and cook for 10 minutes. Add sugar snap peas to the noodles 3 minutes before the end of cooking time. Heat the oil in a frying pan.
Sauté the salmon in it. Season with salt and pepper. Add fish stock and steam the salmon for 4 minutes. Take the salmon out and keep warm. Pour fish stock through a sieve into a pot. Add cream and bring to the boil. Stir in sauce thickener, season with salt, pepper and remaining lemon juice. Add salmon to the sauce. Drain the pasta and arrange on plates with the salmon and lemon sauce.
Pour fish stock through a sieve into a pot. Add cream and bring to the boil. Stir in sauce thickener, season with salt, pepper and remaining lemon juice. Add salmon to the sauce. Drain the pasta and arrange on plates with the salmon and lemon sauce. Sprinkle with red pepper and serve garnished with lemon and dill