Rinse the clams several times under running water until all the sand has been removed. Cook the pasta al dente, following the instructions on the packet.Heat the oil in a frying pan. Sauté the shallots and garlic until transparent. Add the clams, cover the pan and cook for a few minutes until the clams open. Sprinkle with the parsley. Rinse the spaghetti and mix with the clams. Season with pepper.