1-First Step: Prepare the Mise en Place Thaw 1 sheet of puff pastry in the fridge for 30-40 minutes until pliable but cold. Gather all ingredients: 1 egg for wash, 1 cup heavy whipping cream, 1/4 cup powdered sugar, juice and 1 teaspoon zest from 1 lemon, and 1 cup fresh blueberries. Line a baking sheet with parchment paper. Work on a lightly floured surface to prevent sticking. This setup keeps everything organized and speeds up assembly.

2-Second Step: Shape the Puff Pastry Shells Cut the thawed puff pastry into 12 equal 3-inch squares using a sharp knife or pizza cutter. Place squares on the prepared baking sheet, spacing them 2 inches apart. Gently score a 1/2-inch border around each square with a knife tip, avoiding cutting through. This creates a puffed edge for the filling. Prick the center of each square lightly with a fork to prevent bubbling.

3-Third Step: Apply Egg Wash and Bake Whisk 1 egg with 1 tablespoon water for the egg wash. Brush it lightly over the pastry squares, focusing on borders for extra shine. Bake in a preheated 400°F oven for 12-15 minutes. Watch closely; they are done when puffed, golden brown, and crisp. Remove and cool on a wire rack for 20 minutes. The shells firm up as they cool, ready for filling.

4-Fourth Step: Make the Lemon Cream Filling In a chilled bowl, whip 1 cup heavy whipping cream with an electric mixer on medium speed until soft peaks form, about 2 minutes. Gradually add 1/4 cup powdered sugar, 2 tablespoons lemon juice, and 1 teaspoon lemon zest. Continue whipping to stiff peaks, 1-2 more minutes. Taste and adjust sweetness if needed. Gently fold in 1 cup fresh blueberries, reserving a few for garnish. The folding keeps berries whole and cream airy.

5-Fifth Step: Assemble the Pastries Spoon or pipe the lemon cream filling into the cooled pastry shells, staying within scored borders. Fill generously but avoid overflow. Top each with extra blueberries. Dust lightly with powdered sugar using a fine sieve for a professional touch. Chill in the fridge for 15 minutes to set the cream.

6-Final Step: Serve and Enjoy Serve immediately or keep chilled up to 2 hours. Pair with coffee or tea for brunch. Each pastry bursts with flavor, the flaky crust contrasting creamy filling and juicy berries. Store extras as noted later. These blueberry lemon pastries impress with minimal effort.