01 - Combine flour, instant yeast, granulated sugar, and salt in a large mixing bowl. Whisk thoroughly to ensure even distribution of yeast and sugar.
02 - Pour warm milk, melted butter, eggs, and lemon zest into the dry ingredients. 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 for 8–10 minutes, pushing dough away with heel of hand and folding back toward you, until smooth and elastic. Dough should spring back when pressed.
04 - Place dough in a lightly greased bowl, turning once to coat all sides. Cover with plastic wrap or warm damp towel. Let rise in a warm, draft-free area for 1 hour or until doubled in bulk.
05 - Combine blueberries, sugar, lemon juice, cornstarch, and lemon zest in a small saucepan. Cook over medium heat, stirring constantly, for 2–3 minutes until mixture thickens and bubbles. Remove from heat and let cool completely.
06 - Punch down risen dough to release air. Roll out on a lightly floured surface into a 15x10-inch rectangle, maintaining even thickness throughout.
07 - Spread cooled blueberry filling evenly over dough, leaving a 1/2-inch border. Starting from a long side, roll dough tightly into a log. Pinch seam to seal.
08 - Using unflavored dental floss or sharp knife, cut log into 12 equal rolls. Place rolls cut-side up in a greased 9x13-inch baking dish, leaving slight space between each.
09 - Cover baking dish with plastic wrap or towel. Let rolls rise in a warm place for 30 minutes until puffy and nearly doubled.
10 - Preheat oven to 350°F. Bake rolls for 22–25 minutes until golden brown on top and cooked through. If edges brown too quickly, cover loosely with foil after 18 minutes.
11 - While rolls bake, whisk powdered sugar, lemon juice, and melted butter in a small bowl until smooth and creamy. Add additional lemon juice 1 teaspoon at a time if too thick.
12 - Drizzle warm lemon glaze evenly over rolls immediately after removing from oven. Serve warm or at room temperature.