There are many ways that food can help to boost our immune system.  First, choose food that is fresh, and easy to digest.  It’s also best to choose foods that are grown organically whenever you can.  Favor vegetables, whole grains, legumes, and light dairy products.  You can also cook with immune-boosting spices, like turmeric, cumin, coriander, black pepper, and ginger.  Cook food so that it is easier to digest, but don’t overcook it so that it is mushy.  Eat at peak digestive times.  The largest meal of the day should be lunch, eaten between noon and 1 pm, when Pitta is strongest.  Eat lighter meals for breakfast and dinner.  Eat at the same time every day so that your digestion gets into an efficient routine.  And eat until you are about 75% full.  Don’t stuff yourself, save some space for the digestive process to function.  Choose foods for your dosha type, and also for the season.