I cannot say with absolute certainty, or if this is the correct order—all speculation mind you! But you will need to have the original members of this Vallo pass back through to this side. And then close the portal using the same conjuration magic of equal force. There are details in there, that are up for debate, but that would do it to shake everything loose and to stop touching one another.
And food is always relevant! But I do like to hear of others' interests. Hobbies. Extracurriculars and the like. We contain multitudes that are not derived from one singular impression or singular focus.