What do they with the thirteen desserts when leave for Midnight Mass?

It's not about leaving the thirteen desserts for Midnight Mass, but rather eating them after Midnight Mass.

The tradition of thirteen desserts, called "les treize desserts" in French, is part of the Christmas Eve celebration in Provence, France. Here's the breakdown:

* The Number 13: Represents Jesus and the 12 Apostles at the Last Supper.

* The Desserts: There's a mix of sweet and savory, often symbolizing different things:

* Fruit: representing the fruits of the earth and bounty.

* Dried Fruits: representing the gifts of the Magi.

* Candied fruits: representing the "sweetness" of life.

* Nuts: representing good luck.

* Honey: representing hope.

* Turrón: (a nougat-like confection) representing prosperity.

* Midnight Mass: Families go to Midnight Mass, return home, and then enjoy the thirteen desserts together.

So, the tradition is to consume the thirteen desserts after Midnight Mass, not leave them behind.