Architectural Rhubarb & Rye Tart with Yuzu Frangipane

Instructions

1. 1

   In a food processor, pulse 75g Rye flour, 100g All-purpose flour, 40g Toasted almond flour, 50g Confectioners' sugar, and 2g Fine sea salt. Add 110g Unsalted butter and pulse until it resembles coarse sand. Add 1 Large egg (yolk only, reserve white) and 15g Ice water; pulse just until the dough comes together. Form into a block, wrap, and chill.

   10 min

   Tip: Why this works: Rye flour absorbs hydration differently than wheat. The almond flour mitigates toughness, giving you a shell that cuts cleanly without shattering.

2. 2

   While the dough chills, combine 200g Water, 200g Granulated sugar, 10g Dried hibiscus flowers, and the seeds of 1 Vanilla bean in a wide saucepan. Bring to a simmer to dissolve the sugar, then remove entirely from the heat.

   5 min

   Tip: The hibiscus provides an acid-driven tannic note and dyes the syrup a vibrant jewel tone, fixing the color of the rhubarb.

3. 3

   Trim 400g Rhubarb stalks into precise, parallel batons that will fit geometrically across your tart pan. Slip them into the hot (but not boiling) syrup. Cover and let poach passively until barely tender.

   15 min

   Tip: Fix it fast: If your rhubarb turns to mush, your heat was too high. Passive, residual heat ensures structural integrity.

4. 4

   Using a slotted spatula, carefully lift the rhubarb batons onto a parchment-lined tray to cool flat. Return the saucepan to medium heat and reduce the remaining syrup until it heavily coats the back of a spoon. Strain out the hibiscus and reserve the glaze.

   10 min

   Tip: Cooling the rhubarb flat prevents the batons from curving or bending while they set.

5. 5

   Roll the chilled dough between two sheets of parchment to a 3mm thickness. Line an 8-inch tart ring (or rectangular equivalent). Trim the edges perfectly flush. Dock the base with a fork and place the shell in the freezer. Preheat your oven to 350°F (175°C).

   15 min

   Tip: Precision is freedom: A frozen shell is non-negotiable for blind baking. If the butter is solid going into the oven, the walls won't slump.

6. 6

   Whisk together the remaining 80g Toasted almond flour, the remaining 60g Granulated sugar, 50g Fruity extra virgin olive oil, the remaining 1 Large egg (whole), 10g Yuzu juice, the zest of 1 Lemon, and 1g Flaky sea salt until a smooth paste forms.

   5 min

   Tip: Olive oil creates a cleaner, less cloying frangipane than butter, allowing the subtle citrus notes to push forward.

7. 7

   Line the frozen tart shell tightly with crumpled parchment paper. Fill to the brim with pie weights or dried beans. Bake on the middle rack until the edges are set and smell nutty.

   20 min

   Tip: Crumpling the parchment first softens it, allowing it to conform precisely into the corners of the tart without gouging your dough.

8. 8

   Carefully remove the parchment and weights. Return the empty shell to the oven and bake until the base looks dry and takes on a medium-brown hue.

   5 min

   Tip: We need the base fully sealed and baked now, as the wet frangipane will stop it from crisping further.

9. 9

   Spread the frangipane in an even layer directly into the hot tart shell. Return to the oven and bake until the filling is puffed, set, and golden brown.

   20 min

   Tip: Putting room-temperature filling into a hot shell kickstarts the baking process and prevents a soggy boundary layer.

10. 10

    Remove the tart from the oven and let it cool completely on a wire rack before attempting to un-mold or cut.

    45 min

    Tip: Let it cool. Future you deserves clean slices.

11. 11

    Arrange the chilled rhubarb batons in a tight, parallel pattern over the baked frangipane. Lightly brush the batons with the reserved hibiscus glaze. Finish with the remaining 1g Flaky sea salt.

    10 min

    Tip: The glaze adds a jewel-box shine and a hit of concentrated vanilla-tannin flavor. The salt is the final contrast.