About how much pasta will this sauce cover?

Also, it depends on your (national) style of serving pasta and sauce.
Americans tend to cover the pasta more than Italians do.

As all the recipe gives you for measurements are "beautiful tomatoes" and "bunches" of basil, it looks like you're on your own. Heinz (or maybe Hunt's) puts eight great tomatoes in a teeny tiny tin. They don't say if they're beautiful.