I found Seoul on Wheels at the Eat Real Food Festival in Oakland, Calif. at Jack London Square. Julia Yoon was serving up a truncated menu of Beef, Chicken, Pork or Tofu Korean tacos and spicy chilled noodles.
We tried the chicken and beef Korean tacos. They were very good. The charcoal grilled beef and chicken BBQ was served on a corn tortilla with chopped romaine lettuce, sliced daikon radish and topped with sour cream and spicy gochujang. The bulgogi taco had the right amount of sweet and savory that one expects from bulgogi and the grilled chicken was a good kind of spicy. A small amount of sour cream kept the spice balanced.
The best part of our visit to Seoul on Wheels (besides trying their food) is an impromptu interview I did with a young man who was trying Korean food for the first time. Check out his reaction to his first bite at 2:03.