Efi mini bootloader missing after updater ran, won't boot

I am trying the Ubuntu image for a le potato and rebooted without realizing the Ubuntu software updater needed me to manually finish the grub update, so the mini efi bootloader in /boot/efi is missing. That folder only holds cmdline.txt and config.txt. Is there a place where I can get the bootloader file? I assume that would give me a grub prompt from which I can install grub properly. Thanks for any advice.

Edit: I might just burn a new sdcard, update it, and copy over the files, unless someone has a better suggestion.