Selling street food can be very profitable. So profitable, that a hot dog cart owner might be selling them for just $2 but still needs to pay up to 6 digits annually for the permit (based on location). One location near the central park zoo costs 289,500$ annually. And these hot dog cart spots aren't permanent. Each year they are reauctioned and almost certainly at a higher price. [I wrote about this in a previous chapter quite some time ago]
As a side effect of women becoming more independent in recent times, street food has become more popular (as women have less time to prepare meals).
In South Korea, you can buy pancakes that resemble the shape of the poop emoji. It's filled with red bean paste and walnut pieces.
Street stall food has the same problems as restaurants. You don't exactly know what you're eating and how fresh the food actually is. People who regularly eat at food stalls almost certainly have had diarrhea, cholera, typhoid fever or food poisoning. You just need to hope that the food inspector did a good job or if he even checked the place. I've seen enough clips of Kitchen Nightmares to know how disgusting a restaurant can be.
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