Cauliflowers can be kept 4-5 days in the refrigerator. If blanched, you can also freeze them. In order to clean them, you have to remove the leaves and cut the stem. You can separate the florets and cook them in boiling water for 10 minutes. Subsequently, if you prefer, you can bake them at 180° for 10 minutes, adding the ingredients you like and cook them au gratin for another 5 minutes, or in a pan with oil, garlic and chilli pepper..