Using a food processor instead of a stand mixer or mixing by hand is strongly recommended. Instead of adding all eggs at once into food processor, I like to keep it 1 or 2 eggs short. Essentially enough such that flour does not combine into a dough. Then I add water, bit by bit, until the dough combines. This ensures that I have just enough water content to form the dough.
By minimizing the water content of the dough, we maximize the al dente feel. A food processor is fast, it will quickly let you know if enough water has been added or not. A stand mixer, on the other hand, is slower, and will keep you guessing.