some rhubarbenough to cover the base of the mould twice
Instructions
Rub the flour and butter together with your fingertips until the mixture resembles fine crumbs. Stir in the sugar and salt. Add 3 egg yolks and mix until the dough comes together. If it’s too dry, add the fourth yolk or a tiny splash of cold water.
Butter a tin and press the pastry into it.
Cut the rhubarb into 3–4 cm long chunks and blanch them briefly. (I've made it without blanching them, and that worked fine, too.)
Make a meringue from egg whites and icing sugar. Cover the bottom of the pastry with a bit of the meringue, then add the rhubarb pieces, and add the rest of the meringue on top.