Put the frozen crabs in a pan and fry slowly. When the crabs are nice and golden brown, remove the pan from the heat and set aside.
Cook the pasta in well-salted water with a little butter. Before the noodles are ready, put the pan with the crabs on the stove and heat them over low heat. Drain the cooked pasta and place in the pan with the shrimps, heat for approx. 10 minutes and then add the cream, the granulated broth and the cheese.