Preheat your oven to 350°F and grease an 8x4 inch loaf pan.
In the bowl of your stand mixer fitted with the paddle attachment, mix the butter and sugar until well combined.
Add eggs, one at a time, mixing well after each addition.
Mix in the lemon juice.
In a separate bowl, sift the flour, baking powder and salt.
Add half the flour mixture to your wet ingredients and while the mixer is running on a low speed, add half the milk. Mix until combined.
Add the last of the flour mixture and again while the mixer is running, add the last of the milk. Mix until combined.
Using a spatula, fold in the blueberries and lemon zest.
Pour the mixture into your greased loaf pan and bake in the middle of your oven for approximately 1 hour, starting to check at 55 minutes. The loaf is baked when a toothpick inserted into the middle is clean.
Allow to cool slightly in the pan before removing onto a wire rack to cool completely.
To make the glaze, mix enough powdered sugar with the lemon juice so that you get a consistency you like. Drizzle the glaze on the loaf while it is cooling on the wire rack (see notes).