Mix the flour, sugar, ginger, salt and baking powder together well, sift if necessary. Add 3 tablespoons of cold water and knead together with the eggs and butter to form a smooth dough.
Halve the pecans lengthways and mix into the batter. Shape the dough into rolls with a diameter of approx. 2-3 cm. Place on a greased baking sheet and bake in a preheated oven at 150-175 degrees for about 30 minutes.
Take the rolls out of the oven, let them cool for approx. 10 minutes and very carefully cut into 1 cm slices. Spread the slices back on the tray and bake for another 15 minutes at 175-200 degrees.
After baking, remove the cantuccini from the tray and let cool down well.