Sift the wheat flour, boil the water and cool it to 70 ℃. Preheat the oven to 190℃.
Mix all bulk ingredients in a bowl: sifted flour and salt. Pour in olive oil and slightly cooled water. Knead the dough using smooth, gentle movements.
Wrap the resulting dough tightly in cling film and refrigerate for 35 minutes. Then, using a rolling pin sprinkled with flour, roll out the dough into a layer 5 mm thick.
Cut the rolled out dough into thin equal strips, the thickness should not exceed 1 cm. Roll them into neat spirals and place on a baking sheet lined with baking paper. Sprinkle generously with sesame seeds and place in a hot oven for 15 minutes.
Traditionally in Italy, grissini is served as a crunchy snack to accompany alcohol or as a second dinner. Sometimes, for a variety of tastes, they are decorated with grated cheese and olives.