Darren Bader’s work—playful pranks that mock the art world’s shallowness but hold deep ideas—prompts viewers to question what constitutes art (he once injected a slice of lasagna with heroin). True to form, the American artist’s untitled installation at the Whitney features blonde wood plinths topped with fresh fruit and vegetables; once ripe, they’re removed, chopped up, and served to visitors as literal food for thought.