In a large bowl with a nearly-flat bottom, mix together flour and salt.

With one hand, sprinkle a bit of water onto the flour mixture and use your other hand to rub it into the flour; do this gently. Continue adding sprinkles of water and lightly working it into the flour until very small pellets form and the mixture is uniformly moist. You may not use all the water.

Transfer to a parchment-lined baking sheet, breaking up any large lumps, and let dry overnight.