Method
To help make the pastry, appraise the flour right into a bowl and rub within the butter together with your fingertips before the mixture resembles fine breadcrumbs. Add some water, mixing to create a soft dough.
Unveil the dough on the gently floured work surface and employ to line a 20cm/8in flan tin. Leave within the fridge to relax for half an hour.
Preheat the oven to 200C/400F/Gas 6 (180C fan).
Line the pastry situation with foil and fill with baking beans. Bake blind for around fifteen minutes, then take away the beans and foil and prepare for any further 5 minutes to dry up the bottom.
For that filing, spread the bottom of the flan generously with raspberry jam.
Melt the butter inside a pan, remove heat after which stir within the sugar. Add ground almonds, egg and almond extract. Pour in to the flan tin and sprinkle within the flaked almonds.
Bake for around 35 minutes. When the almonds appear to become browning too rapidly, cover the tart loosely with foil to avoid them burning.
Meanwhile, sift the icing sugar right into a bowl. Stir in cold water and transfer to some piping bag.
After you have removed the tart in the oven, pipe the icing outrageous, giving a casual zig zag effect.