Heartburn is chock full of food. Its heroine, Rachel Samstat (Meryl Streep) is a cookery book writer and Nora Ephron’s 1983 novel (which she adapted for Mike Nichols’ screen version) is full of asides in which Rachel discourses on the life-affirming qualities of potatoes, or offers up recipes for cheesecake, vinaigrette, bacon hash and peach […]