This of course, doesn't have to be NFS, but I use a NFS datastore that is R/O exported from a FileServer VM for just this purpose and it works great!
https://esxi.example.com/folder
Note: You really type folder, just replace esxi.example.com!
Find OVA && right click >> copy link
Use Deploy Wizard and deploy from URL
Note: It asked me for credentials, use the cred's you logged into vSphere or ESXi Web-UI with!
Credit:
http://www.running-system.com/deploy-an-ovf-template-stored-on-a-local-esxi-datastore/