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The perfect Christmas gift for you or a loved one
First, make the pastry. Tip the flour, ground almonds, sugar and a pinch of salt into a bowl. Use your fingers to rub the butter in until the mixture resembles breadcrumbs. Drizzle in the egg, then slowly mix in up to 2 tbsp ice-cold water until it comes together into a dough. Shape into a disc, wrap and chill for 30 mins. Will keep chilled for two days.
For the filling, beat the butter and sugar together with an electric whisk until combined. Add the ground almonds and eggs, then beat for 1 min more until you have a thick, spreadable paste. Will keep chilled for up to a day. Remove from the fridge an hour before needed.
Roll the pastry out on a lightly floured surface to the thickness of a £1 coin. Use it to line a 23cm fluted tart tin, leaving some overhanging the rim. Chill for another 30 mins or put in the freezer for 20 mins.
Heat the oven to 200C/180C fan/gas 6. Prick the pastry case all over with a fork, then line with a large circle of baking parchment. Fill with baking beans and bake for 20 mins. Remove the beans and parchment, then bake for 10-15 mins more until the pastry is biscuity brown. Remove from the oven, trim off the excess using a serrated knife, then leave to cool slightly.
Spread the cherry conserve or jam over the base of the tart, then spoon in the frangipane filling and gently spread to the edges. Push the cherries into the filling slightly, then scatter over the flaked almonds. Bake for 45-50 mins until the cherries have sunken into the tart and the filling is deeply golden and set. Leave to cool completely in the tin, then remove to a serving plate or board and cut into slices. Serve with clotted cream, crème fraîche or a scoop of vanilla ice cream, if you like.