"Nom nom" is Internet onomatopoeia, a phrase describing someone noisily and blissfully devouring a mouthful of food. (It's a possible transcription of Cookie Monster's chewing, paired with pictures of cute bunnies or a drunken David Hasselhoff.) If you're anything like me, it's definitely the way you'll be pronouncing David Truong's Nam Nam Cafe -- or at least the sound you'll make with some of his simple and sensational Vietnamese dishes.