Put a pot on medium heat and add coconut oil.
Once melted, add onion, ginger, garlic and green chilies. Sauté for 2 minutes.
Add the sweet potato and sauté for 2 minutes.
Add the tomato paste and salt. Sauté for another 2 minutes.
Add the boiled chickpeas, coconut milk and water. Mix and then turn heat on low. Let cook for 12-15 minutes until the sweet potato is tender.
Add the frozen kale and tamarind paste. Mix and let cook with open lid until the kale is completely defrosted. You can adjust the consistency at this point by adding more water to thin down or cooking longer to further thicken the sauce.
Serve as is, or with rice or bread.