Blueberry and Meyer Lemon Breakfast Pastry

Name: Blueberry and Meyer Lemon Breakfast Pastry
Ingredients: 1 (14-ounce) package frozen puff pastry (such as Dufour), thawed; All-purpose flour, for dusting; 4 ounces cream cheese (such as Philadelphia), at room temperature; 1 cup unsifted powdered sugar (about 4 ounces); 1 teaspoon grated Meyer lemon zest plus 1 tablespoon fresh Meyer lemon juice; ¼ cup blueberry preserves (such as Bonne Maman); ½ teaspoon cornstarch; 1 large egg; 1 tablespoon water; 2 tablespoons whole milk; 1 tablespoon crushed freeze-dried blueberries (from about 1 1/2 tablespoons whole freeze-dried blueberries)