To make the pastry, measure the flour into a bowl and rub in the butter with your fingertips until the mixture resembles fine breadcrumbs. Add the water, mixing to form a soft dough.
Step 2 of 7
Roll out the dough on a lightly floured work surface and use to line a 20cm/8in flan tin. Leave in the fridge to chill for 30 minutes.
Step 3 of 7
Preheat the oven to 200C/400F/Gas 6 (180C fan).
Step 4 of 7
Line the pastry case with foil and fill with baking beans. Bake blind for about 15 minutes, then remove the beans and foil and cook for a further five minutes to dry out the base.
Step 5 of 7
For the filing, spread the base of the flan generously with raspberry jam.
Step 6 of 7
Melt the butter in a pan, take off the heat and then stir in the sugar. Add ground almonds, egg and almond extract. Pour into the flan tin and sprinkle over the flaked almonds.
Step 7 of 7
Bake for about 35 minutes. If the almonds seem to be browning too quickly, cover the tart loosely with foil to prevent them burning.