Put butter, flour, ricotta and salt in a food processor fitted with knife blades. Run until it becomes a dough ball.
Press the dough out into a mold with a removable edge, 24-26 cm in diameter, as high as it goes up on the edges. Leave in the freezer for 10 minutes.
Then bake in the middle of the oven for about 10 minutes.
Lower the oven heat to 175 °.
Tear the zucchini with the peel. Whisk together eggs, cream and cheese.
Stir in the zucchini. Season with salt and pepper.
Pour the filling into the pie shell and bake in the middle of the oven 35–40 min.