All-organic breakfast and lunch spot Heyday, which opened its original location at 180 Spear Street in 2013, is set to branch out with a new, second location at 555 Mission Street (between First and Second) by mid-September. As co-owner Caleb Canning tells SFist, not a lot will change concept- or menu-wise with the second location, and the chef, who's also a partner, will remain the same for both locations, Jeremy Scheiblauer (formerly of Chez Panisse Cafe).

The new restaurant will also feature slightly expanded hours — where the existing location closes at 3 p.m., the Mission Street location will be open from 7 a.m. to 7 p.m.

Heyday offers a selection of organic salads and sandwiches with a Mediterranean bent, all prepared fresh daily and changing seasonally. But unlike a lot of downtown food options catering to the busy lunch demand, Heyday now has a relationship with a small organic farm called Napa Hillside Farms, from whom they buy most of their production including tomatoes, peppers, and stone fruit. As Canning notes, this kind of direct collaboration with a farm is more typical of the top echelon of fine dining, and pretty unusual for fast-casual restaurants like Heyday.

Popular menu items include a green lentil and golden beet salad with cilantro, shredded cabbage and a coriander seed dressing; a Moroccan chickpea salad; and a Fra' Mani salame sandwich with shaved fennel, house made mustard and pecorino cheese.

"People are demanding fresher, healthier and just generally better breakfast and lunch options downtown," says Canning, "And we're all about making great choices easy."

Canning hints, too, that more locations besides the Mission Street one might be in the works in years to come. "Right now we're focussed on making sure the second Heyday location is as delicious as the first," he says. "But in the longer term, we hope we can continue to make more people happy in more places."

Heyday - 180 Spear Street near Howard - Open 7 a.m. to 3 p.m.