Set the container of the soup in the fridge for 1 to 2 days to thaw slowly. To thaw it quickly you can do so in the microwave. To do so, heat for 4 minutes at a time, then use a fork to break apart the frozen chunk as it thaws. Repeat until thawed, then continue heating until it is simmering hot.  Make sure you reheat leftovers completely to ensure they are food safe. Do not reheat twice and do not refreeze.