Notes:
1. Salting the courgette slices helps to draw out excess moisture, ensuring they become crispy when baked.
2. Allowing the courgette rectangles to cool completely before flipping will let the Parmesan set, ensuring everything holds together.
3. Feel free to customize the fillings to your taste. For example, you could substitute the smoked salmon with grilled chicken, turkey, or a vegetarian option like roasted peppers.
