Preheat your oven to 350°F (175°C) and grease a loaf pan. In a mixing bowl, combine the flour, baking soda, and salt, then set it aside.
In another bowl, whisk together the melted butter and sugar, mixing well. Add the eggs one by one, incorporating them fully before adding the lemon zest, juice, and vanilla.
Gradually stir the dry ingredients into the wet mixture until just combined. Gently fold in the blueberries, taking care not to crush them.
Pour the batter into the prepared loaf pan and bake for about 60 minutes, or until a toothpick comes out clean. Allow it to cool slightly before transferring to a wire rack.
Notes
This loaf is best enjoyed fresh, but it can be stored in an airtight container for a few days. Perfect for breakfast or a sweet snack!