Making this fruit tart is easier than you might think. Follow these simple steps:

1. Prepare the Custard
   In a saucepan, whisk together the milk, sugar, and cornstarch until smooth. This mixture forms the base of your custard.
2. Cook the Custard
   Place the saucepan over medium heat. Stir the mixture constantly to prevent lumps from forming. Continue to cook until the mixture thickens, which should take about 5-7 minutes.
3. Add Vanilla
   Once thickened, remove the saucepan from the heat and stir in the vanilla extract. This step infuses the custard with the aromatic sweetness of vanilla.
4. Cool the Custard
   Allow the custard to cool slightly. This step is crucial to ensure that it sets properly in the tart shell.
5. Assemble the Tart
   Pour the vanilla custard into the pre-made tart shell. Use a spatula to spread it evenly across the bottom of the shell.
6. Add Fresh Fruit
   Top the custard with your choice of mixed fresh fruit. Arrange the fruit in a visually appealing pattern to enhance the tart’s presentation.
7. Chill the Tart
   Place the assembled tart in the refrigerator to chill for at least 1 hour. This allows the custard to set and the flavors to meld.