Heat oil in a large pot over medium heat. Cook cumin, turmeric and curry powder until fragrant, about 1 to 2 minutes. Add onion with a few pinches salt, and cook, stirring, until tender, about 6 minutes. Add garlic and ginger and cook, stirring, until tender, about 2 minutes. Add sweet potatoes and bell pepper and cook 1 minute.
Add lentils and Cleansing Broth. Bring to a boil, then reduce heat and simmer until lentils are tender, 20 to 25 minutes. Season with salt and pepper. Top with cilantro before serving.