Put dried mushrooms in water and set aside for at least 2 hours.
At the same time take your frozen puff pastry out of the freezer to defrost.
Cut the onion into cubes, crush the garlic cloves and grate the carrot.
After mushrooms are soaked enough, take them out of the water and cut into smaller pieces.
Once the puff pastry is defrosted, roll it into a rectangle and bend 1cm on all sides. Then take a fork and poke the rest of the dough with it.
Add the puff pastry to the oven and bake 15-20min at 180°C.
To make the filling add some sunflower oil to the pan. Then add onion and garlic and saute for about 5 mins on high heat.
Add grated carrot and saute for 6-7 minutes more. Then, add mushrooms, salt, pepper, ground nutmeg and caraway seeds. Cook for 5 more minutes.
Once the puff pastry is baked take it out of the oven. Take the filling and cover the pastry with it.
Crush walnuts with your hands and chop the parsley.
Top the puff pastry mushroom pie with walnuts and parsley. Enjoy!