Directions
Step 1
Special equipment: a 9-inch springform pan
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Step 2
Preheat the oven to 375 degrees F. Coat a 9-inch springform pan with cooking spray.
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Step 3
Combine 1 cup of the flour, 1 1/2 tablespoons of the granulated sugar and the salt in a food processor and pulse to combine. Add the butter and pulse until the mixture resembles coarse meal with some large lumps. Add the egg yolks and pulse until blended.
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Step 4
Place the dough in the springform pan, and press it evenly against the bottom and about 1 inch up the sides.
Toss 2 1/2 cups of the berries, the lemon zest, juice, cinnamon, nutmeg, remaining 1 tablespoon flour and remaining 1/3 cup granulated sugar in a medium bowl. Pour the berry mixture into the shell and bake until vigorously bubbling, about 1 hour. Remove from the oven and immediately top with the remaining 1 1/2 cups blueberries.
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Step 5
Just before serving, dust with confectioners' sugar by tapping it through a fine-mesh sieve. Serve warm or at room temperature.