INGREDIENTS
1 cup
unsalted butter, cold and cut into cubes
2 1/2 cups
all-purpose flour
1 tbsp
sugar
1 tsp
salt
1/2 cup
+ 1 tablespoon buttermilk, cold
1 lb
fresh blueberries
1/3 cup
sugar
2 tbsp
cornstarch
1/4 tsp
fresh ground nutmeg
Zest of 1 lemon
1
egg, for egg wash
Sanding sugar, for sprinkling