Part 1: Making the Sweet Shortcrust Pastry

Creating the perfect shortcrust pastry is all about technique and keeping things cold. These steps will guide you to a flaky, tender crust that is the ideal vessel for our strawberry filling.

1. Combine Dry Ingredients: In a large bowl, whisk together the all-purpose flour and salt. This ensures the salt is evenly distributed throughout the flour, which is important for flavor development in the crust.
2. Incorporate Cold Butter: Add the cold, cubed unsalted butter to the flour mixture. Using your fingertips, a pastry blender, or a food processor, cut the butter into the flour until the mixture resembles coarse crumbs. The goal is to break down the butter into small pieces while leaving some slightly larger pieces intact. If using your fingertips, work quickly to prevent the heat of your hands from melting the butter. If using a food processor, pulse in short bursts to avoid over-processing. The mixture is ready when it looks like coarse breadcrumbs with some pea-sized butter pieces remaining.
3. Add Sugar and Egg Yolk: Sprinkle the granulated sugar over the flour-butter mixture and stir to combine. Then, add the egg yolk and mix until just combined. The egg yolk adds richness and helps to bind the dough.
4. Add Ice Water and Form Dough: Gradually add ice water, one tablespoon at a time, mixing gently after each addition. Mix until the dough just comes together and forms a shaggy mass. Be careful not to add too much water, as this can make the dough tough. The dough should be moist enough to hold together when gently pressed, but not sticky.
5. Shape and Chill Dough: Turn the dough out onto a lightly floured surface. Gently gather it into a disc about 1 inch thick. Wrap the dough tightly in plastic wrap and refrigerate for at least 1 hour, or preferably 2 hours. Chilling the dough is crucial as it allows the gluten to relax, making the dough easier to roll out, and it firms up the butter, which is essential for a flaky crust. You can even chill the dough overnight if you want to prepare it in advance.

Part 2: Preparing the Fresh Strawberry Filling

While the dough is chilling, we can prepare the delicious strawberry filling. This is a quick and easy process that will fill your kitchen with the sweet aroma of fresh strawberries.

1. Combine Strawberries, Sugar, and Cornstarch: In a medium bowl, gently toss together the sliced fresh strawberries, granulated sugar, and cornstarch. Make sure the strawberries are evenly coated with the sugar and cornstarch mixture. The sugar will start to draw out the juices from the strawberries, and the cornstarch will help to thicken the filling as it bakes.
2. Add Lemon Juice and Vanilla Extract: Stir in the fresh lemon juice and vanilla extract. The lemon juice brightens the flavor and balances the sweetness, while the vanilla extract adds a warm, aromatic note. If using, also stir in the strawberry jam or preserves at this stage for extra flavor and shine.
3. Let Strawberries Macerate (Optional but Recommended): Allow the strawberry mixture to sit at room temperature for about 15-20 minutes, or even up to 30 minutes if you have time. This process, called maceration, allows the sugar to draw out more juices from the strawberries, creating a more flavorful and syrupy filling. You’ll notice the strawberries becoming slightly softer and releasing their beautiful red juices.

Part 3: Assembling and Baking the Mini Strawberry Tarts

Now for the fun part – assembling and baking our mini strawberry tarts! This is where all our hard work comes together to create those beautiful and delicious individual tarts.

1. Preheat Oven and Prepare Muffin Tin: Preheat your oven to 375°F (190°C). Lightly grease a standard 12-cup muffin tin. Greasing ensures the tarts release easily after baking. You can also use paper muffin liners if preferred, though greasing directly in the tin allows for a crisper crust.
2. Roll Out Dough: Remove the chilled dough from the refrigerator. On a lightly floured surface, roll out the dough to about ⅛-inch thickness. Work quickly as the dough will become softer as it warms up. If the dough becomes too soft to handle, return it to the refrigerator for a few minutes to firm up.
3. Cut Out Tart Circles: Using a 4-inch round cookie cutter or a sharp knife, cut out circles from the rolled-out dough. You should get approximately 12 circles, depending on how efficiently you roll out the dough and re-roll scraps. Re-roll any dough scraps to cut out more circles until you have 12.
4. Press Dough into Muffin Tin: Gently press each dough circle into a muffin cup, fitting it snugly into the bottom and up the sides. Make sure the dough is evenly distributed and forms a neat tart shell. You can use your fingers or the back of a spoon to help shape the dough in the muffin cups.
5. Fill Tart Shells: Spoon the prepared strawberry filling evenly into each tart shell. Distribute the strawberries and the accumulated juices evenly among the tarts. Don’t overfill the tarts, as the filling may bubble over during baking. Leave a little space at the top of each tart shell.
6. Bake the Tarts: Bake in the preheated oven for 20-25 minutes, or until the crusts are golden brown and the strawberry filling is bubbly and slightly thickened. The baking time may vary slightly depending on your oven, so keep an eye on the tarts towards the end of the baking time.
7. Cool and Serve: Once baked, remove the muffin tin from the oven and let the tarts cool in the tin for about 5-10 minutes. This allows the filling to set slightly and makes it easier to remove the tarts. Then, carefully remove the tarts from the muffin tin and transfer them to a wire rack to cool completely. Cooling completely is important as it allows the filling to thicken further and the crust to crisp up.
8. Optional Glaze (for extra shine): For an extra touch of shine and sweetness, you can brush the cooled tarts with a simple glaze made from warmed apricot jam or strawberry jam, thinned with a little water.