Screenshot in vr mode

I’m looking to create a project with the possibility to take a screenshot during the visit of a room.
I’m working in VR, and I’m using HTC Vive.
I’d like to open a simple menu (clicking a button of the controller), with the sub-menu “screenshot”, and, clicking in it, taking a screenshot of the room (just like taking a real photo), and saving automatically in a folder.
How can I do It? Maybe with blueprint (or with some plug-ins or templates)?
Thanks a lot for the help!