Add the rinsed lentils, chopped onion, minced garlic, minced ginger, cumin, turmeric, garam masala, cayenne, diced tomatoes, and vegetable broth to the slow cooker. Stir to combine.
Cover and cook on low for 6 to 7 hours or on high for 3 to 4 hours until the lentils are soft and the mixture has thickened.
Stir in the fresh spinach and let it cook for another 10 minutes until wilted. Taste and add salt and black pepper as needed.
Serve hot with fresh cilantro and lemon wedges on the side.
Notes
For a thicker consistency, mash some of the lentils with the back of a spoon before adding the spinach. Leftovers keep well in the fridge for up to four days and reheat smoothly with a splash of broth or water. If you prefer milder flavor, reduce the cayenne to a pinch or omit it.Course: Main Course
Cuisine: Indian
Equipment: Slow Cooker, Cutting Board, Knife