From everyone else’s responses here… I’d guess that whoever made this is from Seattle? And has a favorite vendor that makes them that way? No grilled onions? They usually do have siracha and jalapeno available…

Also they usually butterfly the brat. Cooks it faster with a much better flavor. The works at my favorite stand means cream cheese, grilled onions and sauerkraut. We have spicy items and sauces available self serve because not everyone likes them.

I always just considered a hot dog with cream cheese Seattle style. Banging.