Shantou's oyster omelette stalls turn tiny oysters, egg, starch, and herbs into a crisp-edged, soft-centred plate that tastes better than its humble ingredients suggest. It is a classic Chaoshan snack and a good test of a street kitchen's heat control.
The old port area is a good place to look in the evening. Order one plate, then follow it with rice noodles, fish balls, or whatever the neighbouring table is eating.