It’s cold and damp outside and time to eat foods that make you feel warm. Cocoa, obviously, is a good choice. Iced tea and lemonade, obviously bad choices. Ice cream? No.
Lentils? Yes, especially if you eat them when they are warm (as opposed to cold, on a salad, which is also very yummy but not particularly warming).
All warm foods, obviously, are warming (hello). Lentils are doubly warming, however; they are also included in the list of Traditional Chinese Medicine’s warming foods (I think it has something to do with the qi or air flow in your body).