A delicious recipe of Walnut and Jam Bars -Hungarian Londoni Szelet from Transylvania. The rosehip is the star of the recipe, but plum or lingonberry jam works too.
In a bowl place flour, salt, sugar and baking powder together. Add cubed cold butter and work it into the flour mixture with your fingers or a pastry tool until you obtain a sandy mixture.
Add egg and knead them together until you obtain a dough.
If you use a food processor:
In a food processor, place flour, salt, sugar and baking powder together.
Add butter and pulse 3-4 times or until you obtain a dough that has a sandy texture.
Add egg and pulse few more times until you obtain a dough.
Shape the dough into a thick disk, wrap in plastic and refrigerate for 30 minutes.
Meanwhile, make the walnuts topping:
Beat the eggs until frothy, then add the sugar and the zest of the lemon. Beat again until creamy. Incorporate the ground walnuts.
Preheat the oven to 350F/180C.
Lightly flour the dough and the table surface and roll the dough to the size of a 9x13 inch(23/33cm) baking pan.
Place the dough in the baking pan.
Spread a layer of jam over it.
Spread the walnut mixture over the jam.
Place the baking pan inside the oven and bake for 40 minutes.
When cool, cut in squares and serve. This bars should be kept room temperature in a dry, cool place(closed container). They last about 14 days.