Punjabi kadhi freezes well for a couple of weeks! You must, however, freeze the kadhi and pakoras separately. Once the kadhi is cooled down, store in a freezer safe container. Also, the tadka tastes best when added right before serving, so I wouldn't recommend freezing the kadhi with the tadka. If you add it later, it'll freshen up the kadhi. Thaw the kadhi in the refrigerator overnight, and when you are ready to eat, reheat it, add the pakoras and the tempering and serve.