Creating your own Caprese Pesto Tarts is a fun and rewarding experience. Just follow these simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C).

2. Prepare Puff Pastry: On a lightly floured surface, roll out the puff pastry sheet slightly larger. Cut into 4-6 equal squares, depending on your tart size preference.

3. Arrange Pastry: Place the pastry squares on a lined baking tray. Use a knife to score a 1-inch border around each square, ensuring not to cut all the way through.

4. Add Pesto: Spread a thin layer of basil pesto within the scored border of each tart.

5. Layer Ingredients: Begin layering with slices of fresh mozzarella, followed by tomato slices. Season with salt and pepper to taste.

6. Brush With Egg: Beat your egg and brush the edges of each tart for a golden finish.

7. Bake Tarts: Place in the preheated oven and bake for 20-25 minutes or until the pastry is puffed and golden brown.

8. Add Basil: Once baked, remove from the oven and let cool slightly. Top with fresh basil leaves.

9. Drizzle with Olive Oil: For an extra flavor boost, drizzle a bit of extra virgin olive oil over the tarts.

10. Serve Warm: Enjoy these delicious Caprese Pesto Tarts warm or at room temperature.