They would shoot the beauties at the end, as if the food were the rapture, or the apocalypse. In the meantime, there was choreography. “I will add butter and shortening,” said Sara Moulton, who has hosted dump-and-stir television shows for nine years and taped more than a thousand segments. She stood in the middle of her mise en scène, a setup very much like the classic stove and counter of her mentor, Julia Child. “I will give a few pulses of the food processor,” Moulton continued, “add cheese, give four more pulses. I will then go to the fridge. I will get the apples . . .”