Cook the pasta in boiling salted water according to the instructions on the packet. Wash leek, cut into rings and cook in boiling salted water for 2-3 minutes. Stir flour and cooking cream until smooth. Stir the flour-cream into the stock, bring to the boil while stirring and simmer for 1-2 minutes.
Season sauce with salt and pepper. Remove leek from the water. Wash salmon, dab dry and cut into cubes. Add the salmon cubes to the sauce and cook over a low heat for about 3 minutes.
Wash the dill, dab dry and chop finely except for a flag and add to the sauce. Drain the pasta. Mix the noodles and leek and serve with the salmon sauce. Sprinkle pasta with parmesan slices and garnish with dill.