Prepare shortbread cookie dough recipe as directed
Preheat oven to 375 degrees
Grease a 9x13 inch baking pan
Put the shortbread cookie dough into the pan and press to spread
Bake for 10 minutes
While crust is baking, whisk together eggs, sugar, cornstarch, and lemon juice until frothy
Pour lemon mixture over the hot crust
Return pan to oven and bake for an additional 20-25 minutes or until light brown
Cool and dust with powdered sugar