Umami or savory is one of the basic five tastes.
In 2374, Rafin offered Chakotay some food, saying it wasn't so savory. (VOY: "Nemesis")
When describing the discriminating palates of Klowahkan food critics Sir Legnog and Madame Gonald, Dr. Gabers Migleemo implied that their sense of taste went "beyond umami". (LD: "A Farewell To Farms")