This lentil and spinach stew is a healthy and flavorful meal that is perfect for a cold winter day. The lentils are cooked in a savory tomato sauce with onions, garlic, and spices, and then simmered with spinach until tender. Lentils are a great source of protein and fiber, while spinach is packed with vitamins and minerals. This stew is vegan and gluten-free, making it a great option for those with dietary restrictions. Serve with a slice of whole-grain bread for a complete meal.