1. In a small saucepan, heat ghee, add garlic, ginger and onions. Sauté for few minutes.
2. Add sweet potato, beetroot and lentils and then water to soften and cook.
3. Stirring occasionally, simmer for up to 45 minutes, until all are soft. Add water and mash for desired consistency.
4. Serve with plain yoghurt or on its own.