There are a few things you can do. Store the khichdi for 2-3 days in the fridge and then reheat it and garnish with chopped cilantro and serve again. Taste as good as fresh! Another way to use up it up is to add 1-2 boiled mashed potatoes, chopped green chillies and herbs of choice to the khichdi, adjust the salt and make a firm dough. Make small patties and pan fry to make tikkis.