Peel and finely chop the onion. Melt butter, fry onion in it, add flour and sweat it. Deglaze with cream and stock. Boil up while stirring constantly. Season with salt, pepper, saffron and lemon juice.
Clean and wash the mangetouts. Cook in boiling salted water for about 7 minutes. Cook pasta in boiling salted water for about 8 minutes. Wash the salmon and cut into thin slices. Wash the lime and cut into slices. Heat the oil. Fry the salmon for 2-3 minutes on each side. Season with salt and pepper. Fry the lime slices briefly in the frying fat.
Heat the oil. Fry the salmon for 2-3 minutes on each side. Season with salt and pepper. Fry the lime slices briefly in the frying fat. Season sauce again. Serve the noodles and sauce, mangetouts, salmon and lime slices in portions garnished with lemon strips