Yes! When the soup is cool enough to handle, ladle it into glass canning jars or other freezer safe containers, leaving about 1/2 of space at the top for expansion. Place in the refrigerator until chilled, then freeze for up to 3 months. If I’m planning to freeze a batch of this soup, for the best flavor and texture, I always wait to add the kale or other greens until I’m ready to reheat and serve.