It's pretty simple.
3 cups flour
1 tsp salt
1 cup water
Mix dry ingredients, then start adding water gradually while kneading until it becomes dough.
Put it in a plastic bag and put that bad inside another bad, and start gently stepping on it for about 15 minutes. If it starts breaking apart, add a bit more water.
Refrigerate for ate least 3 hours.
Cut the dough in half and put the second half in the 'fridge until you've finished the first half.
Roll flat (about 1/16") sprinkling with a bit of flour, fold in thirds, and cut into noodles