Follow these simple steps to create your Nectarine Almond Frangipane Tart:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C).
2. Prepare Tart Shell: Place the pre-made tart shell in a 9-inch tart pan and set aside.
3. Make Frangipane Filling: In a mixing bowl, combine almond flour, granulated sugar, and softened butter. Beat until smooth and creamy.
4. Add Eggs: Add the eggs one at a time, mixing well after each addition.
5. Incorporate Flavorings: Stir in the vanilla extract, almond extract, and all-purpose flour until fully combined.
6. Spread Filling: Pour the frangipane mixture into the prepared tart shell, spreading it evenly.
7. Arrange Nectarines: Layer the sliced nectarines on top of the frangipane filling in a circular pattern.
8. Bake: Place the tart in the preheated oven and bake for 40-45 minutes, or until the filling is set and lightly golden.
9. Cool: Once baked, remove the tart from the oven and allow it to cool in the pan for about 15-20 minutes.
10. Dust with Powdered Sugar: Before serving, dust the tart with powdered sugar for an elegant touch.

By following these steps, you’ll be well on your way to creating a scrumptious Nectarine Almond Frangipane Tart that is sure to impress!