Bring 3-4 l salted water to the boil in a large pot. In the meantime peel and finely dice the onion. Wash the mint and shake dry. Pluck off the leaves and chop them coarsely.
Rinse salmon, dab dry and possibly bone. Dice salmon. Add the pasta to the boiling water and cook for about 6 minutes. Stir from time to time to prevent them from sticking together.
Heat the oil in a large frying pan. Sauté the onion in it until transparent. Add the salmon cubes and fry for 2-3 minutes, turning carefully. Add mint briefly.
Add peas to salmon. Pour lemon juice and wine. Bring everything to the boil and simmer for about 2 minutes. Season with salt, pepper and sugar.
Just before the end of the cooking time, try a noodle. If it still has bite in its core, it is cooked. Add 6-8 tablespoons of pasta water to the salmon. Drain the noodles.
Mix the noodles in a pot or immediately in a large serving bowl with the salmon-peas sauce. Season again with salt, pepper and sugar if necessary.