Tip: Kale is available in curly, ornamental and dinosaur varieties. Dinosaur kale is much more fibrous (woody) and much stronger flavoured. If you're a kale novice, start with the mild curly variety to acquire a taste for it. Still too strong? You can substitute romaine lettuce or baby spinach for a milder taste. Freeze figs to avoid spoilage and reserve for future use. You can use dried figs; just soak them first for a couple of hours to soften them up. (If you like, my out can use the soaking water in the recipe for natural sweetness). Peel and freeze bananas in quarters (which will blend more easily and help smoothies stay cold) for future use.