come conservare il basilico sott'olio. When the sterilized jar has cooled and the basil leaves are dry, spread a layer of basil in the jar. Sprinkle with a little salt and add a tablespoon of oil. Continue with another layer and so on. Press well the leaves between one layer and another. It is important that all the leaves are covered with oil. Place a small weight on top of the leaves, because they will tend to float on the oil. Refrigerate once opened.