In a saucepan melt the avocado butter on medium heat, add the onion, carrot, celery and garlic and cook until the onion is nice and glossy.
Add all the spices and give it a good stir. Grate the fresh ginger into the saucepan, add the vegetable stock and bring to the boil.
Add the green lentils and follow the instructions of the pack you are using in order to cook them (normally they will need to simmer for about 15-20 minutes).
Add the salt and season with black pepper. When the lentils are nearly cooked stir in the kale for a few minutes.