Dissolve the salt in the water. Combine the flour combine the flour, salted water while slowly drizzling in the cream. Shape into a ball, roll out into a rectangle and let rest in the refrigerator. Roll out the dough and insert the butter sheet. Close up the dough package and give it its turns.
Cut the pecan halves in half and roast in a140°C convection oven for 15 minutes. Heat the maple syrup to 117°C. Add the pecans. Caramelize then add the butter. Let cool.
Cream the softened butter with the brown sugar. Add the finely ground almonds, ground pecans and flour then gradually incorporate the room-temperature eggs. Stir the room-temperature pastry cream until smooth and combine with the other mixture. Finally, add the warmed rum.
Prepare a traditional pastry cream.
Combine all ingredients and set aside in the refrigerator.
Perform 5 single turns, respecting the resting time
between each turn. Roll the dough out to a thickness of 1.5 mm and cut into 28 cm discs. Let
rest.
Pipe 300 g of frangipane into Ø20 cm diameter circles on a sheet of parchment
paper using a plain 12 mm nozzle. Sprinkle 80 g of caramelized pecans on top,
then freeze.
Moisten the edges with water using a pastry brush. Place a frangipane
insert in the centre of a puff pastry disc. Cover with another puff pastry
disc, turning it a quarter turn (to ensure even shrinkage during baking).
Optionally, trim the galettes to Ø26 cm. Flip the galettes over. Brush with egg
wash twice (30 minutes apart, keeping them in the refrigerator between coats).
Mark the surface using a 9 cm maple leaf–shaped cutter.
Score the surface, prick the galette, and bake in a 170°C convection oven for
approximately 40 minutes. Dust with dextrose and bake for an additional 10
minutes. Let cool.