After an update broke my 2015 MBP, I installed Ubuntu 18.04 on it (via USB). Now I want to go back to MacOS. When I boot into recovery mode (cmd+optn+R), I reach the usual menu of options. When I select the reinstall option, it takes me to the screen with the Mojave logo in a circle, and asks me which disk I want to install on.
However, no disks appear. Recovery mode doesn't seem to recognize that I have any hard drives at all
how can I reinstall MacOS on my laptop?