INGREDIENTS
1 cup
granulated sugar
zest of one lemon
3 cups
all-purpose flour
1 tsp
baking powder
1/4 tsp
salt
1 cup
cold unsalted butter, cut into 1/4-inch pieces
1
large egg (lightly beaten)
juice of one lemon
1/2 cup
granulated sugar
4 tsp
cornstarch
4 cups
fresh blueberries