Simplify the following text for a Grade 11 native English-speaking person.
Original: Professor Helen Leach , a culinary anthropologist at the University of Otago in New Zealand , has compiled a library of cookbooks containing 667 pavlova recipes from more than 300 sources .
Simplified: Professor Helen Leach , who studies the history of food at the University of Otago in New Zealand , collected 667 pavlova recipes .