joyce25_jason_fox_cag_083.JPGChef Jason Fox at his restaurant Commonwealth. Photo: Carlos Avila Gonzalez/The Chronicle 2014 Related Links Jason Fox refines the menu at Oro Chef Jason Fox (Commonwealth, Oro) will soon travel back in time. This July, the chef has signed on to cook a medieval-inspired pop-up dinner benefiting Cut Circle — a late-medieval and Renaissance vocal ensemble directed by Jesse Rodin, an associate professor of 15th century food and music at Stanford, that brings early music education to under served Bay Area communities. The evening’s elaborate four-course meal will be inspired by recipes from the 14th and 15th centuries, including dishes like capons in aspic, roast quails in broom flower sauce,
