What is Tali Sauce you ask? The first time I went, I was a little ambiguous about the Tali Sauce, primarily because I had never heard of it, but also because it is very yellow. While I still do not know the exact ingredients, it has a lemon-garlic taste and, as I now understand, is referred to by many as "crack sauce". Essentially, it makes the Whole Bowl, the Whole Bowl.
As a side note, I personally hate cilantro. So while cilantro is one of the main ingredients in the Whole Bowl, The Whole Bowl accomodates its customers by taking special orders, so I do not have to pick out the dreaded herb.
All in all, if you're only in Portland for one day and you are dying to try out or are craving food cart food, I highly recommend the Whole Bowl. Even to those who can't eat gluten, because the Whole Bowl is gluten-free!