“Doppio Zero sits in a popping shopping center in Concord, with promises of Southern Italian fare. The pies come in oblong circular shapes and light blistering on the crust. The margarita is a bit of a surprise; while the form usually has a pronounced tang, Doppio Zero’s version has some creaminess. As the fresh mozzarella melts, it lends a milkiness to the pie, which works well with the crisp, stretchy dough. Along with the Concord location, there are outposts in Mountain View and San Francisco. Dine in the expansive interior equipped with a full bar and shelves of wine, or grab a table in the patio covered with shade sails and dangling ropes of lights.”