Store the vegetable puree in ice cube trays, or transfer the frozen puree cubes to freezer safe zip-top bag. It will keep for 4 months in the freezer. Be sure to label with the date and contents. This puree will keep in the refrigerator for 3-4 days. When ready to use a frozen cube, place cubes in an airtight container in the refrigerator to defrost overnight. Serve at room temperature.