ANTWERP, Belgium (AP) — One sells a cheeseburger whose patty is 100 percent cheese, another sells meatballs the size of baseballs and a third tempts palates with insects on a skewer. The wafting aroma of everything from Indonesian satays to BBQ pork and stone-oven pizza drifted into the city center, drawing throngs of foodies to the Antwerp quayside. Thomas Serros, originally from San Francisco, has a specially outfitted bicycle he pedals to outdoor markets to sell his homemade tacos. Demand was so great during the Antwerp festival that the meatballs ran out, but customers were patient enough to wait in line for the next batch. Out of a small trailer, decorated to look like a barn, she serves a meatless cheeseburger that is coated in tempura batter, deep-fried and topped with spinach, spring onions and balsamic vinegar.