In a bowl, mix the flour and salt. Add the butter and a dash of water.
knead the dough (by machine or by hand) until it is uniform and soft, adding water as needed.
Reserve 30 minutes in the refrigerator.
After the resting time, roll out the dough with a rolling pin and fill the pie pan. Refrigerate again for 30 minutes (or more).
Preheat oven to 200°C (400°F). Prick the dough with a fork and bake for 15 minutes.
For vegetables
Using a mandolin (or a good knife) slice the zucchini and carrots into long strips.
Put them in a bowl and sprinkle with olive oil. Add salt, pepper and oregano. Mix well to coat all the vegetable strips.
For the base
In a bowl, mash the ricotta with a fork. Add the cream and mix well.
Dice the olives. Add them to the cream with parmesan.
Add salt and pepper and mix to obtain a homogeneous cream. Set aside in the refrigerator until the dough is ready.
For the assembly
Once the pastry is pre-baked, pour the cream into the pie shell and spread it evenly.
Roll up zucchini and place it in the center of the pie. This will be your "heart". Arrange the zucchini strips in a spiral, alternating with the carrot strips, around the "heart" of the pie. Squeeze the strips together and cover the entire surface of the pie.
Cook for about 45 minutes for vegetables that are still slightly crisp, or for 1 hour for more tender vegetables.