01 - Combine flour, instant yeast, sugar, and salt in a large mixing bowl. Whisk thoroughly to distribute yeast evenly.
02 - Pour warm milk, melted butter, eggs, and lemon zest into dry ingredients. Stir with a wooden spoon until shaggy dough forms.
03 - Turn dough onto lightly floured surface. Knead for 8 to 10 minutes, adding flour as needed, until smooth, elastic, and no longer sticky.
04 - Place dough in a greased bowl, turning once to coat. Cover with plastic wrap and let rise in warm, draft-free area for 1 hour until doubled in size.
05 - Combine blueberries, sugar, lemon juice, cornstarch, and lemon zest in small saucepan. Cook over medium heat, stirring constantly, for 2 to 3 minutes until thickened. Transfer to bowl and cool completely.
06 - Punch down risen dough. Roll into 15x10-inch rectangle on lightly floured surface. Spread cooled blueberry filling evenly over dough, leaving 1/2-inch border on edges.
07 - Starting from long edge, roll dough tightly into log. Pinch seam to seal. Slice into 12 equal pieces using serrated knife or unflavored dental floss.
08 - Place rolls cut-side up in greased 9x13-inch baking dish. Cover with towel and let rise 30 minutes until puffy and nearly doubled.
09 - Preheat oven to 350°F. Bake rolls for 22 to 25 minutes until golden brown and filling bubbles slightly. Cool in pan 10 minutes.
10 - Whisk powdered sugar, 2 tablespoons lemon juice, and melted butter in small bowl until smooth. Add additional lemon juice 1 teaspoon at a time if too thick.
11 - Drizzle warm glaze evenly over rolls while still slightly warm. Serve immediately or allow glaze to set for 15 minutes before serving.