Push all ingredients through a juicer. Alternatively, blend all ingredients in a powerful blender starting with 1 cup water until smooth, adding an additional cup of water as needed. Strain through a fine-mesh strainer.
NOTE: You can change the color of this lemonade by replacing the kale with beets for a red juice or carrots for an orange one. But don’t let your imagination stop there, have fun with it. And during cold and flu season be sure to add a chunk of ginger to the mix