Wash and dry the lemons and cut the skin in thin slices, then cook them in boiling water for a while, to eliminate the bitter flavour. In a pan cook the onion in butter, wet with the filtered lemon juice, then wait a few seconds and add the cream and bring to boil. Boil the tagliolini pasta in salted boiling water, drain a little al dente and skip all in a pan by adding the lemon skin, parsley and pepper. Serve very hot
