Combined the softened butter, salt and sugar. Add the flour and stir just to combine. Then add the egg yolks and milk without overworking the dough. Place in the refrigerator.
Heat the fruit purées to 40°C. Add the combined pectin and sugar (1). Bring to a boil, then add the sugar (2). Bring back to the boil and add the lemon juice.
Heat the milk (1) and citrus zest and pour over the previously combined sugar, custard powder, cornstarch, and milk (2). Bring to a boil, add the cream cheese, the cream, then blend with an immersion blender. Meanwhile, beat the egg whites until stiff with the sugar. Combine the two mixtures while warm. Whip lightly.
Combine all ingredients and set aside in the refrigerator.
Roll the pastry out to a thickness of 3.5 mm. Let rest in the refrigerator.
Cut into 60 x 4 cm strips. Press into buttered Ø18 cm rings. Seal the seams
with egg white. Level off. Cut out Ø19 cm circles and place them inside the
rings, pressing down gently to seal the bases and the sides. Let rest for at
least 1 hour in the refrigerator.
Blind bake on Silpain mats in a 170°C convection oven for 25 minutes. Let cool.
Spread 200 g of confit in the bottom of the tart shell. Pipe 350 g of the
cheese filling on top and smooth the top into a dome shape. Spray the top and
sides of the tart shell with a thin coating of the egg wash.
Bake in a 220°C convection oven for 1 minute (damper open) then lower the
temperature to 160°C and continue baking for 19 minutes (internal temperature
62-64°C maximum). Let cool. Place a Ø16 cm disc in the centre of the surface
and sprinkle around the edges with icing sugar.