Most seasonal health advice is subtractive. Ayurveda's advice for late winter is not.
The texts hold that agni — digestive fire — is not constant across the year. Cold weather drives it inward and concentrates it; heat disperses it. So digestion is at its annual strongest in Hemanta and Shishira, and at its weakest in summer and the rains. The same logic gives you the corollary that surprises people: strength, bala, is also highest now. Late winter is when the classical texts expect you to be at your most capable.
The prescription follows straightforwardly. Eat well. Eat warm, oily, substantial, sweet-and-sour-and-salty food — the three heavy tastes. Ghee, sesame oil, whole grains, dals cooked long, root vegetables, dairy if it agrees with you, nuts, dates. This is the season for the heaviest thing on your list of things you can digest.
And there is a reason beyond pleasure. In late winter a strong fire with nothing substantial to work on will start on your own tissues — the texts describe exactly this, dryness and depletion appearing in people who eat lightly in the cold. Undereating in Shishira does not make you lean. It makes you brittle.
One caution that is easy to miss: eat well does not mean eat late. Digestion still follows the day. The heavy meal belongs at midday, when your fire is highest within the day as well as within the year.