01 - In a large mixing bowl, whisk together flour, instant yeast, sugar, and salt until thoroughly combined.
02 - Create a well in the center of the dry ingredients. Pour in warm milk, melted butter, eggs, and lemon zest. Mix with a wooden spoon or stand mixer fitted with dough hook until a shaggy dough forms.
03 - Turn dough onto a lightly floured surface. Knead by hand for 8 to 10 minutes, adding small amounts of flour as needed, until dough is smooth, elastic, and springs back when pressed.
04 - Place dough in a lightly greased bowl, turning once to coat. Cover with plastic wrap or a clean kitchen towel. Let rise in a warm, draft-free area for approximately 1 hour until doubled in volume.
05 - While dough rises, combine blueberries, sugar, lemon juice, cornstarch, and lemon zest in a small saucepan. Cook over medium heat, stirring constantly, for 2 to 3 minutes until mixture thickens and coats the back of a spoon. Remove from heat and cool completely.
06 - Punch down risen dough and turn onto a lightly floured surface. Roll into a 15 by 10-inch rectangle, approximately 1/4-inch thick.
07 - Spread cooled blueberry filling evenly over the dough surface, leaving a 1-inch border along the long edges. Starting from a long side, tightly roll dough into a log. Pinch seam to seal.
08 - Using unflavored dental floss or a sharp knife, cut log into 12 equal rolls, approximately 1 1/4 inches thick.
09 - Place rolls cut-side up in a greased 9 by 13-inch baking dish, spacing evenly. Cover loosely with plastic wrap. Let rise in a warm place for 30 minutes until rolls are puffy and touching.
10 - Preheat oven to 350°F. Bake rolls for 22 to 25 minutes until tops are golden brown and cooked through. Rotate pan halfway through baking for even browning.
11 - While rolls bake, whisk powdered sugar, lemon juice, and melted butter in a small bowl until smooth and glossy. Adjust consistency with additional lemon juice if needed.
12 - Remove rolls from oven and let cool in pan for 5 minutes. Drizzle warm glaze evenly over rolls. Serve warm or at room temperature.