Creating Mushroom, Shallot and Herbed Goat Cheese Tarts can be simple if you follow these steps:

1. Preheat the Oven: Start by preheating your oven to 400°F (200°C).
2. Prepare the Puff Pastry: Roll out the puff pastry on a lightly floured surface. Cut it into squares and place them in greased tartlet pans.
3. Sauté the Shallots: In a skillet, heat olive oil over medium heat. Add the shallots and sauté for about 2-3 minutes until they become translucent.
4. Add the Mushrooms: Add the sliced mushrooms to the skillet. Cook until they soften and release their moisture, approximately 5-7 minutes. Season with salt and pepper.
5. Prepare the Filling: In a mixing bowl, whisk together the eggs, heavy cream, and herbed goat cheese until smooth. Fold in the sautéed mushrooms and shallots.
6. Fill the Pastry Shells: Ladle the mushroom mixture into the prepared puff pastry shells, filling them generously.
7. Bake the Tarts: Place the filled tarts into the preheated oven. Bake for 25-30 minutes, or until the pastry is golden brown and the filling is set.
8. Cool and Serve: Once baked, allow the tarts to cool for about 10 minutes before serving. Garnish with fresh herbs.

These steps provide a clear pathway to creating a batch of delightful tarts that will impress anyone lucky enough to taste them!