Remove the hard base from the asparagus, peel them with a potato peeler or gently with a small knife
proceeding vertically from top to bottom, removing the filamentous green part, but leaving the tips intact. Wash them well and cut them into pieces of about 3-4 cm. Cook them in plenty of boiling water for 5 minutes, then remove them from water and let them cool. It is important not to throw the water away, but save it instead for cooking the rice.