I need to share my favorite grilled onion recipe. Great/fantastic with fajitas, just ate with ny strips.
Simply almost quarter an onion, wedge in some butter, sprinkle with salt, wrap in foil.
I had it on a grate at 450 for about 45 minutes, you can't go too long, but you can go too short - longer is better. I usually place it directly on coals. Rotate every 20 minutes, les time if you are on coals, maybe 30 minutes total.
When done, squeeze a lime on it and enjoy!
This one could have gone longer, but was good. If the whole onion looks like the last photo, you have found nirvana.
+++++++++++++++++++++++++++Austin, Texas. I'm the guy holding a beer.