“My Salad Years,” the title of Adam Higgins’s debut exhibition at Chris Sharp Gallery, was a paean to innocence, channeling the halcyon times spoken of in Shakespeare’s Antony and Cleopatra (1623), where “green” connotes youth as much as lettuce. Yet the artist’s deft, nearly photorealistic renditions of salads—Caesars more specifically, keeping with the classical theme—do belie this, as they suggest durational practice and studied command of painting’s devices instead. In any case, Higgins has worked on this subject exclusively for the past two years. (An iterative body of work from 2019 focused