Method
Place the sugar, flour, almonds and cinnamon inside a large mixing bowl and stir until well combined.
Add some cubes of butter and rub them in to the flour mixture together with your fingertips before the mixture resembles coarse breadcrumbs. It ought to feel quite moist.
Add some egg and stir having a wooden spoon before the dough all comes together, then knead gently right into a ball. Weigh the dough and have a quarter away for the lattice topping. Roll the remainder right into a ball and switch it onto a properly-floured surface.
Flatten the ball together with your hands, or perhaps a floured moving pin, until it's about 2.5cm/one in thick. Put the dough within the center of the 24cm/9 in loose-based, fluted tart tin and press it together with your fingers within the base until it's about midway in the sides from the tin and also the tin is also covered.
Spread the jam within the dough as evenly as you possibly can.
Shape the reserved dough right into a fat sausage and roll it on the well-floured surface to create a rectangle 3mm/in thick – concerning the thickness of the 1 gold coin. Cut the dough into 1.5cm/in strips. Put the strips within the jam, first one way and so the other, to produce a criss-mix pattern within the filling. Press the perimeters to close, pinch from the excess pastry and smooth the joins lower together with your fingertips. Chill the tart within the fridge for 30–60 minutes.
Preheat the oven to 190°C/375F/Gas 5. Place the tart on the baking sheet and bake within the center from the oven for around half an hour or before the almond pastry is pale golden brown. Awesome within the tin for 5–10 minutes, then slide it onto an amount platter or board.
Decorate having a light dusting of icing sugar, if you want, and work into wedges for everyone.