This may be too late - sorry I didn’t see this earlier. We’ve eaten with friends at Osteria Coppa in downtown SMateo and thought it was very good. All four of us are fans of Perbacco/Barbacco; OC is not its equal but definitely much better than the average SMateo restaurants.
Osteria Coppa
Address: 139 S B St, San Mateo, CA 94401
Phone:(650) 579-6021