Step 1: In a large bowl, combine the warm milk, sugar, and yeast. Let it sit for about 5-10 minutes until it becomes frothy and bubbly.
Step 2: Stir in the melted butter and egg. Gradually add the flour and salt, mixing until a soft dough forms.
Step 3: Knead the dough on a floured surface for 5-7 minutes until smooth and elastic. Place in a greased bowl, cover, and let rise in a warm place for 1 hour.
Step 4: Punch down the risen dough and roll it out into a 12x18 inch rectangle on a lightly floured surface.
Step 5: Spread softened butter over the dough, then sprinkle with a mixture of brown sugar and cinnamon. Evenly distribute the fresh blueberries over the top.
Step 6: Roll the dough tightly into a log starting from the long edge. Cut into 12 even slices using a sharp knife or dental floss.
Step 7: Place the rolls in a greased 9x13 inch baking pan. Cover and let rise for another 30-45 minutes.
Step 8: Preheat oven to 350°F (175°C) and bake for 20-25 minutes until the blueberry cinnamon rolls are golden brown.
Step 9: Whisk together powdered sugar and lemon juice. Drizzle the glaze over the rolls while they are still warm and serve.