Creating Cheesy Caprese Pesto Tarts is an enjoyable process. Follow these easy steps to make your own delectable tarts:

1. Preheat Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Prepare Puff Pastry: Roll out the puff pastry sheet on a floured surface and cut it into desired tart sizes, typically about 4 inches squared.
3. Transfer to Baking Sheet: Place the cut pastry squares onto the prepared baking sheet.
4. Create Borders: Gently score a border around each pastry, about 1/2 inch from the edges, to create a crust. Be careful not to cut through.
5. Spread Pesto: Spread a spoonful of basil pesto inside the scored border of each tart.
6. Add Cheese and Tomatoes: Scatter the diced mozzarella and cherry tomatoes evenly over the pesto layer.
7. Season: Drizzle a little olive oil on top, and add salt and pepper to taste.
8. Egg Wash: Beat the egg in a small bowl and brush it along the borders of each tart for a golden finish.
9. Bake: Place the baking sheet in the preheated oven and bake for about 25-30 minutes, or until the pastry is puffed and golden.
10. Garnish: Once cooked, remove from the oven and let them cool for a few minutes. Garnish with fresh basil leaves before serving.

These straightforward steps will guide you in creating delicious cheesy Caprese pesto tarts that captivate your family and friends.