What's the best way to get a charcoal taste on a propane grill?
From what I see you have 2 options.


you can Add liquid smoke to your bbq sauce you use (if you use). Warning, a little bit is alot.
you could create a 'smoke packet' soak a handful of hickey wood chips, wrap in aluminum foil and poke some holes. Place this packet underneath the grill, once you get some smoke coming out, start cooking your meat