Svarta vinbärskokosskivor

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1. 1
   Heat oven to 180C/160C fan/gas 4. Grease a 20 x 23cm traybake tin with a little butter and line the base with a long strip of baking parchment that extends above the rim of the tin at either end – this will make it easier to get the slices out of the tin later.
2. 2
   To make the base, tip the flour, sugar and coconut into a bowl, mix everything together, then rub in the butter with your fingers to make coarse crumbs. Stir in the egg yolks with the blade of a knife, then bring the mixture together with your hands to make a dough. Press the dough into the base of the tin, smoothing it with the back of a spoon to make an even layer. Spread the jam over most of the dough, keeping it a little bit away from the sides of the tin.
3. 3
   To make the topping, whisk the egg whites with an electric hand whisk until stiff, then gradually add the sugar to make a glossy meringue. Fold in the desiccated coconut, then spoon over the jam layer. Scatter with the coconut flakes, if using, and bake for 25 mins until golden.
4. 4
   Leave to cool in the tin, then carefully lift out, using the parchment to help you, and cut into slices. Will keep in an airtight container for 2 days.