I've tested a few ways of cooking dry noodles without using so much water.

Rather than boiling the pasta...I'll slow cook it right into the soup or spaghetti sauce.

If the spaghetti sauce is really thick I'll add some water & stir it in before adding the dry pasta.

Sometimes I've added to many or too few noodles...but thru practice I can eyeball it pretty well now.

The noodles are usually pretty good after 45-60 minutes of slow cooking. Always cook COVERED or some noodles wont cook properly. (lasagna takes about an hour and 20 minutes for some reason).

This method saves quite a bit of water...and another pot & strainer.