Making Mushroom, Shallot and Herbed Goat Cheese Tarts involves a straightforward process. Follow these steps for a successful outcome:

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 to about 1/4 inch thickness. Cut the pastry into squares or circles, depending on your tartlet molds.

3. Fit Pastry into Molds: Place the pastry pieces into tartlet molds, ensuring they fit well. Prick the bottom with a fork to prevent puffing during baking.

4. Sauté Vegetables: In a skillet, heat olive oil over medium heat. Add chopped mushrooms, shallots, and garlic. Sauté until the mushrooms are softened and the shallots are translucent, about 5-7 minutes. Season with salt and pepper, then remove from heat.

5. Prepare Cheese Mixture: In a bowl, mix the softened herbed goat cheese with heavy cream until creamy. Beat in the egg until fully incorporated. This mixture will be the filling for the tarts.

6. Combine Ingredients: Add the sautéed mushrooms and shallots to the cheese mixture. Stir until well combined.

7. Fill Tart Shells: Spoon the mushroom and cheese mixture into the prepared pastry shells, filling each one to the brim.

8. Bake Tarts: Place the filled tarts in the preheated oven and bake for 25-30 minutes, or until the pastry is golden brown and the filling is set.

9. Cool Down: Remove the tarts from the oven and allow them to cool slightly before removing them from the molds.

10. Garnish: For an extra touch, garnish with fresh herbs before serving.

These straightforward instructions will guide you through creating Mushroom, Shallot and Herbed Goat Cheese Tarts that will impress everyone at your table!