Best Ever Blueberry Cobbler

INGREDIENTS

6 cups

or 850 g) fresh blueberries, sorted, rinsed and dried

1 cup

granulated cane sugar

2 tsp

freshly grated lemon zest

3 tbsp

unbleached all-purpose flour

1 cup

plus 5 tablespoons (about 158 g) unbleached all-purpose flour

6 tbsp

granulated cane sugar

1 1/2 tsp

baking powder

1/4 tsp

(1.2 g) fine-grain sea salt, or ¼ teaspoon (1.5 g) regular table salt

6 tbsp

or about 85 g) unsalted butter, chilled & cut into bits

large egg (mine weighed 52 g w/o shell), slightly beaten

1 tsp

pure vanilla extract

1 tbsp

granulated cane sugar

1/2 tsp

ground cinnamon, optional

1/4 tsp

freshly ground nutmeg, optional