This recipe is a classic version of Dal Makhani, a popular Indian dish made with black lentils and kidney beans. The lentils and beans are cooked with aromatic spices like cumin, coriander, and garam masala, along with tomatoes and onions. The dish is slow-cooked to perfection, resulting in a creamy and flavorful dal. Serve it with rice or naan bread for a delicious dinner.