Turn the oven to 180-200 degrees, baking tray lay a parchment paper greased with butter. With lemon remove the zest grater, then to the crust (to avoid bitterness), cut into pieces, remove seeds and blend the lemon in a blender. Cold margarine RUB on a grater, add salt, sugar, vanilla sugar and egg, all lightly RUB, add the beaten egg and lemon zest. Then pour the sifted flour with the baking powder, knead soft dough, if necessary adding flour.

From the test blind any cookie I have made in the shape of bagels. Lubricate the cookies with the beaten egg and sprinkle with sugar. Place in oven, bake until light Golden brown, or until edges are brown. Enjoy your tea!