Long-time Filipino restaurateur Chris Joseph has served ube across his London establishments for the past decade, but interest in drinks and desserts featuring the purple yam has surged in the past year. Ube, a naturally sweet, starchy vegetable that is grown by farmers in the Philippines, has been the star of Joseph and his wife Rowena Romulo's Soho restaurant Kasa and Kin, founded in 2021. "What was really flying off the shelf was ube from the start," Joseph told CNBC in an interview. Their