How to log manually scheduled interviews?

Summary:

We have a number of situations where we will not use the OOTB Interview functionality through OR. For example, instead of adding an interview schedule, slots and inviting candidates, a recruiter may organise it off system in times where the hire is urgent and needed straight away.

What we are struggling with is how to log this on the system? We want to be able to log the interview date and time against the candidate submission so the recruiter has a log of it, and also we would need to be able to report on it to. Is there any way we can do this?