North Beach’s Il Casaro Pizzeria on Columbus Avenue has been among San Francisco’s go-to favorites for Napolitan-style since opening in 2014. It’s popularity led to a second Il Casaro in the Castro three years later, with the same team also opening the North Beach Roman-style pizzeria Barbaro Pinsera in 2018, and California Fish Market a few blocks away in 2020.

But now co-owners Francesco Covucci and Pete Fazio are getting back to basics — just with a lot more basics involved — with their new offshoot Casaro Osteria, which opened last week in the Marina at Union and Fillmore Streets.