We love the sweet-tart flavors of ume plum wine, but its a difficult ingredient to use in cocktails; it can come across as overpowering and one-note, saccharine-sweet. Its a challenge, but one that jimmy vongsouvanh at rainbow chinese restaurant and bar in minneapolis, minnesota, passed with flying colors. Inspired by the neon-fuschia wedges of pickled plums beloved by the restaurants owner, vongsouvanh offset plum wine with their own house-made sweet and sour sauce. Use that if youve got it but a simpler mix of lemon juice and simple syrup is lovely, too. Topped with light, refreshing cava (or another sparkling white wine), the result is a lovely glass of bubbly with a unique twist.