Answer: The method of loci
Step-by-step explanation:
The method of loci is a memorization technique that is used to remember a large amount of information, situations or spaces with a series of details. This method helps the brain to remember the information through the performance of a series of actions, emphasizing the details. The method of loci works employing a journey that the person does in places that are familiar to him, such as the house or another place. Imagination is key for the method to work since the person creates a series of mental images of anything to remember the desired information.
In Trinh's case, since she does not want to share her secret recipes, she decides to use this method to remember them and thus not have to disclose them. Trinh creates a path and in each place, he leaves the ingredients and thus knows what he has to throw and to what extent. The method of loci is an old and very little known method, but if it is used in the right way it gives good results.