Slow-Cooker Mulligatawny Soup is a flavorful and hearty Indian-inspired soup. Made with a combination of lentils, vegetables, and spices, this soup is packed with nutrition and delicious flavors. The slow-cooker method allows the flavors to meld together and the lentils to become tender and creamy. Serve this soup with a side of naan bread or rice for a complete and satisfying meal.