Step 1

Preheat the oven to 350° F.

Step 2

Using a hand mixer, mix together the butter and sugar in a medium-sized bowl until well blended. Add the flour, cornstarch, and salt and mix until combined.

Step 3

Press the dough firmly into a lightly buttered 5-inch baking dish using your fingertips or the back of a spoon.

Step 4

Bake 18-20 minutes, until lightly golden. Remove from the oven and set aside to cool, about 20 minutes.

Step 5

In a small bowl, toss the blueberries with sugar, flour, lemon zest, and lemon juice. After the ingredients are well combined, pour them over the cooled cookie crust.

Step 6

Place the baking dish on a baking sheet and bake for 45 to 50 minutes.

Step 7

Remove the pie from the oven to cool, 2 to 3 hours.