Preheat oven to 350 degrees.
Grease and line 8x4 inch loaf pan with parchment paper.
In a large mixing bowl beat butter, sugar, lemon juice and eggs.
Combine flour, baking powder and salt in a separate bowl.
Add dry ingredients into egg mixure; alternate by adding milk and then remaining dry ingredients.
Fold in blueberries and lemon zest.
Pour into loaf pan; bake for 50-60 minutes or until toothpick inserted in the center comes out clean.
Cool on wire rack.
For the glaze combine fresh lemon juice and powdered sugar. Slowly add more lemon juice, if needed, until it becomes a pouring consistency. Drizzle over the bread.