Method
Preheat oven to 350°F (175°C) and grease a loaf pan.
In a mixing bowl, beat together the melted butter, 1 cup sugar, lemon juice and eggs until combined.
In a separate bowl, combine the flour, baking powder, and salt.
Stir the dry ingredients into the egg mixture alternately with the milk until just combined.
Fold in the grated lemon zest, chopped walnuts (if using), and blueberries.
Pour the batter into the prepared loaf pan and smooth the top.
Bake at 350°F for 60 to 70 minutes, or until a toothpick inserted into the center comes out clean. Allow to cool slightly in the pan.
For the glaze: combine lemon juice, melted butter and confectioners' sugar; mix well to a pourable consistency.
Drizzle the glaze over the warm loaf. Let set before slicing.
Notes
This glaze recipe is doubled from the original. If using frozen blueberries, toss them in a little flour to help prevent them from sinking.