Strawberry Rhubarb Tart with Vanilla Custard and White Chocolate Step-by-step instructions

Before you start

Before starting, ensure the puff pastry is thawed according to the package instructions. Prepare the vanilla custard if making it from scratch, and chill it until needed. Slice the rhubarb and strawberries as directed, and grate the white chocolate.

Have all ingredients measured and ready. Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper. This mise en place approach makes the assembly smooth and enjoyable.

Instructions

Prep and Chill

1. 1Prepare the Fruit and Chocolate
   Slice the rhubarb stalks on a sharp diagonal bias into thin, elegant ribbons. Hull the strawberries and halve them cleanly. Grate the solid block of white chocolate on a box grater into a pile of fine curls. Set all aside.
   Look for Rhubarb slices are thin and uniform; strawberries are neat halves; chocolate curls are light and fluffy.
   Tip Chill the white chocolate before grating for cleaner curls.
2. 2Roll Out the Puff Pastry
   On a lightly floured surface, roll the puff pastry sheet into a rectangle about 1/4-inch thick. Transfer to a parchment-lined baking sheet. Prick the pastry all over with a fork, leaving a 1-inch border unpricked. Chill for 15 minutes.
   Look for Pastry is cold and firm; the border is clearly defined.
   Tip Chilling prevents the pastry from shrinking too much during baking.

At this stage, the fruit is prepped and the chocolate is grated. The puff pastry is rolled and chilled, ready for the custard. The kitchen smells fresh and clean, with no components cooked yet. The pastry should be cold and firm, which will help it hold its shape during baking.

Assemble and Bake

3. 3Spread the Custard
   Spread the vanilla bean pastry custard evenly over the base of the puff pastry, staying within the pricked area. Use an offset spatula to create a smooth, even layer.
   Look for Custard is smooth and level, not too thick.
   Tip If the custard is too thick to spread, soften it slightly at room temperature.
4. 4Arrange the Fruit in Chevron Rows
   Arrange the diagonal rhubarb ribbons and strawberry halves in geometric chevron rows over the custard. Overlap them slightly for a beautiful pattern. Brush the exposed pastry edges with the egg wash.
   Look for Fruit forms a neat V-shaped pattern; edges are glossy with egg wash.
   Tip Use a ruler or just eyeball it—chevrons don't need to be perfect.
5. 5Bake the Tart
   Bake in a preheated oven at 400°F (200°C) for 30-35 minutes, until the pastry is puffed and golden brown and the fruit is tender. The custard should be set and lightly browned around the edges.
   Look for Pastry is deep golden and crisp; fruit is soft and juicy; custard is set.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Rotate the baking sheet halfway through for even browning.

The tart is assembled with custard and fruit in a beautiful chevron pattern, and the edges are brushed with egg wash. As it bakes, the kitchen fills with the aroma of butter and fruit.

The pastry puffs up and turns golden, and the custard sets. The fruit softens and releases its juices, creating a glossy, jewel-like topping.

Glaze and Garnish

6. 6Glaze and Finish
   While the tart is still warm, brush the apricot glaze over the top, covering the fruit and pastry. Scatter the white chocolate curls and chopped pistachios evenly over the surface.
   Look for Glaze gives a glossy shine; chocolate curls and pistachios are evenly distributed.
   Tip Work quickly while the tart is warm so the glaze melts slightly into the fruit.
7. 7Cool and Serve
   Let the tart cool on a wire rack for at least 10 minutes before slicing. Lift a warm, flaky portion and serve. The contrast of warm pastry, cool custard, and crunchy toppings is delightful.
   Look for Tart is warm, flaky, and aromatic; custard is set but creamy.
   Tip Use a sharp serrated knife to cut clean slices.

The tart emerges from the oven with a shiny apricot glaze, sprinkled with white chocolate curls and pistachios. The contrast of colors is stunning: deep red fruit, golden pastry, creamy white chocolate, and green pistachios. The tart is warm, fragrant, and ready to be sliced and served.

Common mistakes

One common mistake is not chilling the pastry before baking, which can cause it to shrink and lose its shape. Another is overloading the tart with custard, which can make it soggy; a thin, even layer is enough.

When arranging the fruit, avoid overlapping too much, as this can trap moisture and prevent the pastry from crisping. Finally, do not skip the egg wash on the edges—it is essential for a golden, glossy crust. If the tart browns too quickly, tent it with foil.

How to tell it’s done

The tart is done when the puff pastry is puffed and deep golden brown, and the fruit is tender when pierced with a knife. The custard should be set and no longer jiggly in the center; an instant-read thermometer inserted into the custard should read at least 160°F (71°C).

The edges of the pastry should be crisp and flaky, and the fruit should be slightly caramelized at the edges. Let the tart cool for at least 10 minutes before slicing to allow the custard to set further.

• Egg dishes: 160°F (71°C) in the thickest part