Heat oil in a Dutch oven. Add the cumin seeds and let it bloom for 20-30 seconds. Add the onions, ginger, garlic, and celery, and sauté for 4-5 minutes.
Add the lentils, potato, and water, bring to a simmer, cover and cook for 15 minutes.
Add the noodles followed by salt, black pepper, turmeric, and cayenne. Mix and cook for 5 minutes.
Add the kale, cook for 4-5 minutes.
Add the coconut milk, mix.
Simmer for 2 minutes.
Ladle into soup bowls and serve hot with a piece of crusty bread.