For a richer flavor, consider using homemade vegetable broth. Adjust the amount of chipotle pepper and adobo sauce to your desired level of spiciness. Start with less and add more as needed. Massaging the kale with a bit of olive oil before cooking can help tenderize it. This dish can be made ahead of time and reheated gently before serving. The flavors will meld together even more as it sits. Serve as a vibrant side dish alongside roasted meats, grilled fish, or hearty vegetarian entrees.