Directions

• Place flour and butter in a food processor; pulse until butter is the size of peas. Add sugar and salt; pulse to combine. While pulsing, gradually add ice water, 1 tablespoon at a time, until dough holds together when pressed. Divide dough into two-thirds- and one-third-sized pieces. Shape each into a disk; wrap and refrigerate 1 hour or overnight.
• Preheat oven to 350°. On a lightly floured surface, roll larger piece of dough to a 12-in. circle; line bottom and press up side of a greased 9-in. springform pan or deep dish pie pan.
• Reserve 2 tablespoons beaten egg for egg wash. Place remaining egg in a large bowl with ricotta; beat until smooth. Stir in spinach, parmesan, oil, salt and pepper. Spoon into crust. Place the hard-boiled eggs in an evenly spaced circle, pressing them down into the spinach filling. Roll remaining dough to an 11-in. circle. Place over filling. Trim and seal edge. Cut five slits in top.
• In a small bowl, whisk remaining egg and 1 tablespoon water; brush over crust.
• Bake until crust is golden brown and a knife inserted in center comes out clean, about 1 hour. Serve warm or at room temperature.