📖 Instructions

1. Prepare the Pie Crust (The Foundation of Flavor!): In a large mixing bowl, whisk together 2 ¼ cups (270g) all-purpose flour, 1 tablespoon granulated sugar, and 1 teaspoon salt. Trust me, these dry ingredients are just as important as the wet ones, so make sure they're thoroughly combined.
2. Cut in the Butter: Add 1 cup (226g) of *very cold*, unsalted butter, cut into ½-inch cubes, to the flour mixture. This is where the magic of flakiness begins! Using a pastry blender, your fingertips, or a food processor, cut the butter into the flour until the mixture resembles coarse meal with some pea-sized pieces of butter remaining. This texture is super important for that lovely flaky crust. If using your hands, work quickly so the butter doesn't get too warm.
3. Add Ice Water: Gradually add 6-8 tablespoons of *ice-cold water*, one tablespoon at a time, mixing gently after each addition. Mix until the dough just comes together. Be careful not to overmix! Overmixing develops too much gluten, which can lead to a tough crust. You want it just barely cohesive.
4. Chill the Dough: Divide the dough in half, flatten each half into a disc, wrap tightly in plastic wrap, and refrigerate for at least 30 minutes, or up to 2 days. Chilling the dough is critical; it allows the butter to firm up again and the gluten to relax, making it easier to roll and ensuring a flaky crust. Don't skip this step!
5. Roll Out the Bottom Crust: On a lightly floured surface, roll out one disc of chilled dough into a 12-inch circle. Carefully transfer the dough to a 9-inch tart pan with a removable bottom. Gently press the dough into the bottom and up the sides of the pan. Trim any excess dough, leaving about a ½-inch overhang. Don't worry if it's not perfectly neat; we'll fix that.
6. Blind Bake the Crust (Preventing Soggy Bottoms!): Prick the bottom of the crust all over with a fork. Line the crust with parchment paper and fill with pie weights or dried beans. Chill in the freezer for 15 minutes. Preheat your oven to 375°F (190°C). Bake the chilled crust for 15-20 minutes, or until the edges are lightly golden. Remove the parchment paper and weights and continue to bake for another 5-7 minutes, until the bottom is just dry and lightly golden. This step is crucial for a crisp crust! Let cool completely on a wire rack.
7. Prepare the Strawberry Rhubarb Filling: While the crust cools, in a large bowl, gently combine 4 cups (about 1.5 lbs) sliced fresh rhubarb (½-inch pieces) and 4 cups (about 1.5 lbs) hulled and halved fresh strawberries. To these lovely fruits, add 1 cup (200g) granulated sugar, ¼ cup (30g) cornstarch (or ⅓ cup all-purpose flour for a slightly less clear filling), 1 teaspoon pure vanilla extract, and a pinch of salt. Mix it all up gently with a spatula, making sure the fruit is evenly coated. Don't be afraid to taste a little bit of the raw rhubarb, it's quite the zing!
8. Fill the Tart Shell: Pour the fruit filling into the cooled blind-baked tart shell, spreading it evenly.
9. Create the Lattice Top (Optional but Pretty!): On a lightly floured surface, roll out the second disc of chilled dough into a 12-inch circle. Using a pastry wheel or a sharp knife, cut the dough into ¾-inch wide strips. Arrange half the strips evenly over the filling, parallel to each other, leaving small gaps. Fold back every other strip about halfway. Place a perpendicular strip over the unfolded strips, then unfold the folded strips over the new one. Repeat this weaving pattern until you have a beautiful lattice top. Trim the ends of the lattice strips and gently crimp them together with the edge of the bottom crust, pressing to seal. If you're not feeling the lattice, a simple full top crust with a few vent slits works just as well! You could even do a rustic crumble top if that's more your speed.
10. Egg Wash & Sugar Sprinkle: For that gorgeous golden sheen and a touch of extra sparkle, brush the lattice top (or full crust) with a lightly beaten egg. Then, sprinkle generously with about 1-2 tablespoons of coarse turbinado sugar. This adds a lovely crunch and visual appeal.
11. Bake the Tart: Place the tart on a baking sheet (to catch any potential drips – a lifesaver, trust me!) and bake in the preheated 375°F (190°C) oven for 50-60 minutes. The tart is done when the crust is deeply golden brown, and the filling is bubbly and thick. If the crust starts browning too quickly, you can loosely tent it with aluminum foil.
12. Cool Completely: This is the hardest part, I know! But for the best texture and to allow the filling to fully set, let the tart cool completely on a wire rack for at least 3-4 hours before slicing and serving. It'll be worth the wait, I promise. Warm is tempting, but a completely set tart is divine.
13. Serve: Slice and serve your beautiful rustic strawberry rhubarb tart. It's fantastic on its own, or even better with a dollop of vanilla ice cream or a cloud of freshly whipped cream. Enjoy your homemade masterpiece!