Since January, the Cromwell Museum in Huntingdon, England, has been selling copies of one of the strangest cookbooks ever published. That’s according to Stuart Orme, the museum’s curator, who’s also written the new introduction to The Court and Kitchen of Elizabeth, Commonly Called Joan Cromwell, the Wife of the Late Usurper. This is no Joy of Cooking. Instead, the book begins with what Orme calls “a very ranty essay” against Oliver Cromwell and his wife, Elizabeth. Cromwell, as the first non-royal to preside over the British Isles, was still a…