01 - Whisk together sourdough starter, lukewarm milk, eggs, melted butter, and vanilla extract in a large mixing bowl until smooth and homogeneous.
02 - Combine flour, sugar, salt, baking powder, and baking soda in a separate bowl, ensuring even distribution of leavening agents.
03 - Add dry ingredients to wet ingredients, stirring gently until just combined. Avoid overmixing to prevent tough texture.
04 - Gently fold diced strawberries and white chocolate chips into batter, distributing evenly while maintaining fruit integrity.
05 - Cover bowl and let batter rest at room temperature for 3-4 hours, or overnight in refrigerator, allowing fermentation and flavor development.
06 - Preheat oven to 350°F. Grease and line 9x5-inch loaf pan with parchment paper.
07 - Give rested batter a gentle stir, scrape into prepared loaf pan, and smooth top evenly.
08 - Bake for 50-60 minutes until toothpick inserted into center comes out clean and top is golden brown.
09 - Let cool in pan for 15 minutes, then transfer to wire rack to cool completely before slicing.