From The Vegetarian 5-Ingredient Gourmet Cookbook, by Nava Atlas. Easy to make and freezes very well.
- Heat the oil in a soup pot. Add the onion and saute over medium heat until golden.
- Add the lentils and 6 cups water and bring to a simmer. Stir in curry powder, cover, and simmer very gently for 35 to 40 minutes.
- When the lentils are mushy, stir in the spinach and check the consistency. If the soup is too thick, add about 1/4 cup water. Season with salt and additional curry powder, if desired.
- Simmer for another 5 minutes. If time allows, let the soup stand off the heat for an hour or so to develop flavor. Heat through as needed before serving.