Bianchetto in Kew.Kristoffer PaulsenGlide past a gold curtain in chef Joe Vargetto’s restaurantMister Bianco to findBianchetto,where lighting is scandalously dim,tablecloths are crisp white and one wall is illuminated byprojections of golden-age Italian films. Aperitivo hour is sorted with Americanos mixed tableside on a dedicated trolley,and salty Sicilian snacks by the bowlful.