Recovering from deleted efi

1. Create a Windows Install USB from another PC or have one on hand already
2. Boot into Windows setup using Windows USB
3. Click "Next"
4. Click "Repair your computer" in bottom left corner
5. Click "Troubleshoot"
6. Click "Advanced"
7. Click "Command Prompt"
8. Type "diskpart" and wait for it to load
   
9. Type "list volumes"
10. Find the Windows volume, the letter assigned to it will now be referred to as LETTER:
11. Type "exit"
12. Type "bcdboot LETTER:\windows"
13. If successful, close CMD and click back until you see "Continue - Exit and continue to Windows 10"

Enjoy your now hopefully bootable windows install. If it doesn't boot, then I wish you good luck in finding another solution. Don't forget to leave a comment here, if you can, to explain how it works now.