In a large bowl, beat the butter, sugar, lemon juice and eggs.
Sift together the flour, baking powder and salt; stir into egg mixture alternately with milk, beating well after each addition. Fold in the blueberries,and lemon zest.
Pour bread batter in to a 8-in. x 4-in. loaf pan that has been sprayed with non-stick cooking spray. Bake at 350° for 60-70 minutes or until a toothpick inserted near the center comes out clean.
Cool for 10 minutes before removing bread from pan to a wire rack to cool completely.
To make the glaze, In a small bowl, combine the ingredients and stir until well mixed. drizzle over lemon blueberry bread.