Creating a list of booleans on the fly

Imagine we are pulling data about people and their favourite foods.
The data would come to us in the format: "Name, FavFood₁, FavFood₂..FavFood_n".
e.g. "James, Beans, Chicken".
Notice how we do not know how many foods a person will favour.

From this data we create an instance of a Person object which captures the person's name and favourite foods.
After we have pulled data on every person, we want to create a spreadsheet whose columns would be: Name|Potato|Chicken|Beans|Curry etc.
All of the values to the right of the person's name will be simple boolean values representing whether or not that food was one of the person's favourites.
The problem is: we do not know in advance; all the foods that someone could possibly favour, and as such cannot just set up boolean instance variables in the Person class.

I've given this some thought, implementing sets,hash-sets and hash-maps, however every solution I think of ends up being horribly inelegant and so I've turned to the genius of stackoverflow for help on this one.
My question is: What design pattern / approach can I use to cleanly achieve the outcome I desire?
Whilst this is a language-agnostic question I am programming this in Java, so if there's anything in the Java API or elsewhere built for this, do let me know.
Thanks in advance!