You can add some small pasta shells to the soup to make it a bit more substantial.
The food processor was hell to clean afterwards! Somehow the paste ended up in every nook and cranny of the bowl, blade, lid, etc. Be prepared to slave a bit over the kitchen sink, although I hope you will be luckier than I was.
To convert from cups to grams, and vice-versa, please see this handy Conversion Chart for Basic Ingredients.