01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or line with parchment paper.
02 - In a large bowl, whisk together yogurt, eggs, oil, vanilla, lemon zest, and lemon juice until smooth and fully incorporated.
03 - In a separate bowl, sift together flour, baking powder, baking soda, salt, and sugar.
04 - Gradually fold dry ingredients into the wet mixture until just combined. Do not overmix to maintain tender texture.
05 - Toss blueberries with 1 tablespoon flour to prevent sinking, then gently fold into the batter.
06 - Pour batter into prepared loaf pan and smooth the top evenly with a spatula.
07 - Bake for 50-55 minutes, or until a toothpick inserted in the center comes out clean.
08 - Let loaf cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
09 - Whisk powdered sugar and lemon juice until smooth. Drizzle over cooled loaf before serving, if desired.