Cook onion and garlic in oil or broth in large saucepan, 3 minutes.
Add tomatoes, broth and basil, garlic and oregano to taste - a few shakes of each.
Simmer 10 minutes.
Cool; pour half the mixture into blender or food processor; cover and run on high until smooth. Repeat with remaining mixture. (Our blender held the entire mixture.)
Add a bit of Splenda - taste to be sure flavor pops but it's not sweet .
Stir in fresh basil.
Garnish each serving with a small amount of parmesan cheese (optional).