On a recent road trip home to Germany , cafe owner April Schoengen spotted a purple pastry at a gas station bakery. "It was ube, just as I suspected," she said, surprised at finding a Filipino-flavored dessert at a European gas station. Schoengen sells ube-flavored cakes and drinks at her Filipino-themed cafe, "Ube de Oro" in Bonn . When she opened two years ago, the cafe catered to a mostly Filipino clientele.  Now, she's seeing more and more people from different backgrounds come in,