All good things must come to an end. After 21 years in business, John Furst and Neal Solomon have sold Johnny's Luncheonette in Newton Centre. But all isn't lost: The luncheonette will stay in tact. According to Wicked Local, the new owners are Kevin and Karen Masterson, who used to run Nourish in Lexington Center. They'll keep the old menu and staff. Chef Dante de Magistris is reconstructing the Nourish space and turning it into Il Casale Cucina Campana, sister restaurant to Il Casale in Belmont.