Siem Reap: Soupdragon for US$0.65 "asian" breakfast. I like it for dinner, too. And, then, you're close to random bars.

Crunchy frog out by Bayon if the woman across the road from the tent restaurants is cooking and can be tracked down. Otherwise, pick a chair across the road under the tent and get the shredded ginger chicken for $1.25 or so.

Or, back to the discussion of more luxe places, already in progress.