“AN EMPTY PLATE” IS TASTY FARE AT INVISIBLE THEATRE by Chuck Graham Tucsonstage.com Let the Show Begin Hold the food puns for a minute and let’s be serious. Roberto Guajardo gives another wonderful over-the-top performance at Invisible Theatre in “An Empty Plate in the Café du Grand Boeuf.” What a season he is having. From the multiple characters in “Leaving Iowa” last autumn to the crazily colorful Pancho Villa last winter, to the suicidal gourmet in the recently-opened black comedy “Empty Plate.” There hasn’t been a time that I can remember in Tucson theater when a local actor gave three exceptional performances in one season. As for “Empty Plate,” this quirky play by Michael Hollinger almost defies description. There’s food, of course, and descriptions of gourmet dishes that would make a menu writer’s jaw drop in awe. Succulent adjectives of every texture and flavor lace the script as the chef and maitre d’ extol the scintillating virtues of each new offering from the world class ki