# Components:
→ Dough
01 - 2 1/2 cups all-purpose flour
02 - 1/4 cup granulated sugar
03 - 1/2 teaspoon fine sea salt
04 - 1/2 cup active sourdough starter, fed and bubbly
05 - 1/2 cup whole milk, lukewarm
06 - 2 large eggs, room temperature
07 - 1/4 cup unsalted butter, softened
→ Filling
08 - 1/2 cup granulated sugar
09 - 2 tablespoons finely grated lemon zest
10 - 1 cup fresh blueberries
11 - 2 tablespoons unsalted butter, melted
→ Lemon Glaze
12 - 1 cup powdered sugar
13 - 2 to 3 tablespoons fresh lemon juice
# Directions:
01 - In a large bowl, combine flour, sugar, and salt. In a separate bowl, whisk together sourdough starter, lukewarm milk, and eggs. Add wet mixture to dry ingredients, then mix in softened butter. Knead by hand or with stand mixer for 7 to 10 minutes until smooth and elastic.
02 - Cover dough with plastic wrap or damp towel. Let rise at room temperature for 6 to 8 hours, or overnight, until doubled in size.
03 - In a small bowl, mix sugar and lemon zest until fragrant.
04 - On lightly floured surface, roll out dough into 12x18-inch rectangle. Brush with melted butter. Evenly sprinkle lemon sugar over dough and scatter blueberries on top.
05 - Cut dough into six 3-inch wide strips. Stack strips on top of each other, then cut into six even squares. Arrange squares vertically, cut sides up, in greased 9x5-inch loaf pan.
06 - Cover and let rise for 1 to 2 hours until puffy.
07 - Preheat oven to 350°F. Bake for 35 to 40 minutes, or until golden brown and cooked through. If browning too quickly, cover loosely with foil for last 10 minutes.
08 - Let cool in pan for 15 minutes, then remove to wire rack. Whisk together powdered sugar and lemon juice for glaze, then drizzle over warm bread before serving.