You've never had a diesel burger?
White gasoline (essentially naphtha) will work. Toss your match on the coals while they're still wet.
Anyone remember George Goble? 20 years ago he used liquid oxygen to light a grill. I really recommend reading up on this before attempting it because if done wrong it could explode.
And even without a conflagration event the fireball is quite hot so you better use at least a six to eight foot pole on your cryostat. Of course this is 2017 so why not devise a tipping bucket device hung under a UAV?
Here's the original tape (yes tape!) from 1995:
A weed torch (250mbh) will get the white tips in no time. However if you have a 20# propane tank you may have a gas grill.
