2 medium lemons, juiced and zested (about 1/4 cup lemon juice)
2 tablespoons butter
Meringue
4 egg whites
6 tbsp white sugar
Instructions
Crust:
Pulse shortbread biscuits in the food processor or blender until they are crumbs. Add the butter and pulse until combined.
Press the buttery crumb mixture into a 9-inch pie plate. Chill in freezer for 10-15 minutes or until firm.
Lemon filling:
In a medium saucepan, whisk together the sugar, water, corn starch, egg yolks, lemon juice and lemon zest. Cook over medium to medium-high, whisking constantly, until thickened to slightly thicker than pudding (up to 10-15 minutes).
Remove filling from heat and stir in butter. Pour the hot filling into the crust. Preheat oven to 350°F.
Meringue:
Using the whisk attachment on your stand mixer or a hand mixer, beat the egg whites in a scrupulously clean glass, metal, or ceramic bowl until foamy. Gradually add sugar, continuing to beat the mixture until stiff peaks form.
Spread meringue evenly over the lemon filling, sealing the edges at the crust. Bake pie until meringue starts to lightly brown, about 10 minutes.
Remove from oven and let rest on a wire rack for 1-2 hours, then refrigerate for 5-6 hours or overnight. Slice and serve cold.