| 1 |
Make Pie Crust: In a large bowl, combine flour and 3/4 tsp salt. Cut in chilled shortening using a pastry blender or your fingers until the mixture resembles coarse crumbs with some pea-sized pieces. |
| 2 |
In a small bowl, beat 1 egg, 2 tbsp ice water, and 1 tbsp white vinegar together. Pour this liquid mixture over the flour mixture. Stir with a fork until the dough just comes together. |
| 3 |
Divide dough in half, form each half into a disc, wrap in plastic, and chill in the refrigerator for at least 30 minutes (or up to 2 days). |
| 4 |
Make Filling: In a medium saucepan, combine 2 cups of the blueberries, lime juice, lime zest, white sugar, and 1/2 tsp salt. Cook over medium heat, stirring occasionally, for about 5-7 minutes, until blueberries start to burst and release their juices. |
| 5 |
In a small bowl, whisk together cornstarch and 2 tbsp water until smooth. Stir this slurry into the berry mixture in the saucepan. Cook, stirring constantly, for 1-2 minutes more, until the mixture thickens and bubbles. |
| 6 |
Remove from heat. Gently stir in the remaining 3 cups of blueberries and the chopped fresh mint. Let the filling cool completely while you prepare the crusts. |
| 7 |
Assemble Pie: Preheat oven to 400°F (200°C). Place a large baking sheet on the middle rack to preheat (this helps create a crispy bottom crust). |
| 8 |
On a lightly floured surface, roll out one disc of chilled dough into a 12-inch circle. Carefully transfer to a 9-inch pie plate. Trim edges if necessary. |
| 9 |
Pour the cooled blueberry mojito filling into the crust-lined pie plate. |
| 10 |
Roll out the second disc of dough. Place it over the filling as a solid top crust (cut vents) or cut into strips for a lattice top. Trim, seal, and crimp the edges. |
| 11 |
If desired, brush the top crust with beaten egg wash and sprinkle with Demerara sugar. |
| 12 |
Place the pie in the freezer for 15-20 minutes to chill the crust thoroughly (helps prevent shrinking). |
| 13 |
Bake Pie: Place the chilled pie on the preheated baking sheet in the oven. Bake at 400°F for 20 minutes. |
| 14 |
Reduce oven temperature to 375°F (190°C) and continue baking for another 30-40 minutes, or until the crust is golden brown and the filling is bubbling. If the crust edges brown too quickly, cover them with foil or a pie shield. |
| 15 |
Let the pie cool on a wire rack for at least 2-3 hours (preferably 4 hours) before cutting and serving, to allow the filling to set. |