Cook the noodles al dente. Whisk eggs and cream together. Season with pepper and salt. Put half of the pasta in a greased baking dish. Whisked eggs over it. Spread the fish with sauce on the pasta, add the ketchup. Layer the rest of the pasta on top. 20 minutes in the oven at 180 ° C. Then sprinkle on the grated cheese. Bake for another 20 minutes.