I'll be blunt. The relish dog is the best food truck item I've tasted in the city. First, there's this soft and tasty, just a tiny bit sweet bun. A great hot dog. But that relish...it may look like corn off the cob, but it tastes as sweet as any hot dog relish I've tried.
The long and short of it is that it makes for a brilliant sweet tooth hot dog that you'll need a fork for to grab any bits that fell off.
I am just inches short of giving Chaud Dogs 5 stars, but there are a couple of caveats. For one, the combo item is simply potato chips. Don't bother - the meal is small enough that you're better off ordering two hot dogs anyway. And second, the other hot dogs are far more experiments - "because they can" flavors. Some work, some don't. I like them all, and yet they pale compared to their relish leader.
Take my advice and focus on simply the hot dogs. Your lunch hour will thank you.