Step 1: Prepare the Dough

• In a large mixing bowl or the bowl of a stand mixer, combine the warm milk and active dry yeast. Let it sit for 5–10 minutes until it becomes foamy.
• Add the sugar, lemon zest, lemon juice, yogurt, and melted butter to the yeast mixture. Stir to combine.
• Add the flour and salt gradually. Mix using a dough hook or by hand until a sticky dough forms.
• Knead the dough for about 8–10 minutes until it becomes smooth and elastic. If the dough is too sticky, add a tablespoon of flour at a time, but don’t over-flour it.

Step 2: First Rise (Proofing)

• Place the dough in a lightly oiled bowl and cover it with a clean kitchen towel or plastic wrap.
• Let it rise in a warm area for 60–90 minutes, or until it doubles in size.

Step 3: Prepare the Filling

• While the dough is rising, warm the blueberry jam slightly in a small saucepan to loosen it. Stir in cornstarch if using. Let it cool before spreading.
• Set aside the lemon zest and juice for the glaze.

Step 4: Roll Out the Dough

• Once the dough has risen, punch it down gently to release the air.
• Turn it out onto a floured surface and roll it into a large rectangle, about 18×12 inches.
• Spread the blueberry filling evenly across the surface of the dough, leaving about ½ inch border on all sides.

Step 5: Roll and Slice

• Starting from the long side, roll the dough tightly into a log.
• Use a sharp knife or unflavored dental floss to slice the log into 12 even rolls.
• Place the rolls in a greased 9×13-inch baking dish or a large round cake pan.

Step 6: Second Rise

• Cover the rolls and let them rise again for 30–45 minutes, until puffy.
• Meanwhile, preheat your oven to 350°F (175°C).

Step 7: Bake

• Bake the rolls in the preheated oven for 25–30 minutes, or until the tops are golden and the centers are cooked through.
• Allow the rolls to cool for 10–15 minutes before adding the glaze.

Step 8: Make the Glaze

• In a small mixing bowl, beat the cream cheese until smooth.
• Add the powdered sugar, lemon juice, and lemon zest. Mix until creamy and pourable. Adjust consistency with more lemon juice if needed.

Step 9: Glaze the Rolls

• Spoon or drizzle the glaze generously over the warm rolls.
• Serve immediately or store covered at room temperature for up to 2 days.