Any way to cast/mirror to Roku?

I know that Channels does not support Roku directly, but does anyone know of a way to cast/mirror Channels streaming on my iPhone to a Roku device so that I can see it on the TV the Roku is attached to?

If the Roku is at home on the same network as the DVR, you may be able to click Watch on Roku on the DVR web UI.

Oh wow, I didn't even realize that was a possibility. I'll give it a try. Thanks!