Alyssa Doggett T hirty years ago, Pi Yeng Chen, who goes by Yen and her husband Yi Chiao Chen, who goes by Steven, had to throw out tofu because no one would buy it. “They don’t want to try, they don’t want to taste, so we had a hard time for that. So my husband stopped make tofu because waste,” says Yen Chen. Now, their Halifax Seaport Farmers Market stall, Chenpapa, is one of the busiest in the whole building. “We always sold out every Saturday,” says Chen. Last week, the Chens' daughter Pay announced on Twitter that the couple would be retiring and serving up their last steam buns, noodles and dumplings this coming Saturday, February 6.