Think of a few of your typical savory Filipino dishes—adobo, menudo, kaldereta, nilaga, maybe even kare-kare or sinigang. You can easily imagine all of them incorporating that ubiquitous and beloved brown-skinned vegetable. “I don’t think you will grow up or get to this age in the Philippines without having potatoes, because we love our potatoes,” Reji Retugal, Philippine representative of...