Implementing a 3D Minimap for VR

Hello everyone,

I am working on a VR tower defense game. I want to place my towers on a small map of the field and at the same time show the field/units/towers on the small map, in 3D. Like this:

The map would be something like a small clone of the field. Is there a way to do so with camera etc. So that my minimap is just a re-render/clone of the field.