01 - In a large bowl, mix flour and salt. Add cold butter and rub into the flour until mixture resembles breadcrumbs. Add egg and water, mixing until the dough comes together. Shape into a disk, wrap, and chill for 30 minutes.
02 - Preheat oven to 375°F. Grease a 9-inch tart pan.
03 - Roll out the chilled dough on a floured surface and line the tart pan. Trim edges as needed.
04 - In a large bowl, combine ricotta, chopped spinach, Parmesan, 3 eggs, cream, nutmeg, salt, and pepper. Mix until smooth.
05 - Spread half the ricotta mixture into the tart shell. Using the back of a spoon, make 4 evenly spaced wells in the filling. Carefully crack an egg into each well.
06 - Gently spoon the remaining ricotta mixture around and over the eggs, being careful not to break the yolks.
07 - Bake for 40–45 minutes, or until the filling is set and lightly golden.
08 - Cool for at least 15 minutes before slicing. Serve warm or at room temperature.