Method:
Pour 2 tablespoons of water into a large pot and set over medium-high heat. Add kale a few handfuls at a time, stirring and letting it cook down until all of it fits in the pot. Add onion, lower the heat to medium, cover and cook until onion and kale are tender, 10 to 12 minutes.
Meanwhile, whisk miso and 2 tablespoons boiling water together. Transfer kale and onion to a platter, drizzle with miso mixture and sprinkle with cranberries.