As you eat this unique recipe the juicy, roasted tomatoes break apart into the pasta to make the sauce right on your plate. People at the table might not even notice the extra serving of vegetables you "hid" by grating squash into the pasta, but the flavor will make it a winner.
The fresh salsa called for here has a natural low-sodium advantage over bottled commercial salsa, but if you don't want to make your own salsa, buy a container of fresh salsa from your grocery store deli section.