Ms. Ho and Mr. Fung, both in their 20s, said they had started eating the lunchboxes multiple times a week in recent months, especially after Ms. Ho, who follows many food-related pages on social media, found the Facebook fan group.
The spot they had chosen that day, Kai Kee, was a classic of the genre in its unapologetic lack of ambience. Its walls were lime green, matching the plastic chopsticks and upholstered chairs. (While many two-dishes-and-rice shops are takeout only, some offer spartan seating areas.)
Cardboard boxes, each holding 500 Styrofoam containers, were stacked in the middle of the floor. No music played; the only soundtrack was the shouts of workers hurrying between the kitchen, which exhaled clouds of steam into the dining area, and the front, where the food was served.
The day’s two dozen or so dishes were displayed, buffet-style, in an L-shaped array of stainless steel pans. Two dishes cost 32 Hong Kong dollars, or $4, cash only; each additional dish was $1 extra. All the options — spicy eggplant, pig ears, stir-fried cauliflower — were brightly colored and clearly visible from the street through large windows to entice passers-by.