We tried a couple of stalls for dinner on Tuesday after running into Surfas Cafe and realizing that while they are open until 6:30, they only sell pastries and no other food at that time. Bummer.
The two stalls were adjacent - korean and peruvian. We got a tofu plate at the first and "chicken fried rice" at the second. Tofu plate was ok. It came w/3 blocks of premarinated and sliced firm tofu. It didn't have the look or taste of something grilled, which would have added. Served kind of cold-ish, which wasn't great. However, it came with some passable glass noodles, some decent kimchee, and steamed rice. Pretty good grub overall. The also offered meat dishes but I can't attest as to the quality.
Peruvian chicken fried rice was disappointing. There was nothing Peruvian about it to differentiate from every other fried rice you have ever eaten at a fast food chinese place. Maybe only the little container of light green spicy sauce to pour on top. That plus the fact that every single piece of chicen in the fried rice (they were nuggets) had some cartilage or gristle, and it's not an experience I'll return for.
Both plates were a generous amount of food for about 7 or 8 dollars apiece.
My impression is that the prepared food offerings are much tastier at the Sunday SM on Main, the Sunday Hollywood, and the Thursday SPas. I haven't sampled the prepared foods elsewhere.