Cook pasta in salted water, according to package instructions. Reserve 1 ¼ cups water pasta was cooking in. Drain pasta and then transfer it to a big bowl.
Fill a small pot ½ way with water, bring water to a boil, and boil carrot pieces for 15 minutes, or until carrots are tender when poked with a fork. Drain water from carrots.
In a food processor or blender put carrots, 1 cup of the reserved pasta water, silken tofu, nutritional yeast and garlic salt. Process for 30 seconds to 1 minute until smooth. Scape down the sides with a spatula, add remaining ¼ cup reserved pasta water and process for 30 seconds.
Pour sauce over the pasta and stir so that the sauce evenly coats the noodles, then serve and enjoy.