Heat Olive Oil in a Soup Pot over Medium Heat. Add Onions and a little bit of Salt. Cook, stirring occasionally, until Onions are soft and turning Golden. You can add Thyme, Pepper, Basil, & Butter now. Stir. Add Garlic. Cook for a few minutes until Garlic is fragrant and starting to get slight color.

Add San Marzano Tomatoes, Chicken Broth, & Chicken Bouillon. Bring to a boil, then turn back down to Med to Med Low. Allow to simmer for 20 Minutes. Turn off heat and allow to cool down some. Using a regular Blender or Immersion Blender, blend until smooth. Depending on preference, you can run the soup through a sieve, and put it back into the pot. This will assure a very smooth soup.

Heat soup on Medium again. Taste for seasoning. Add Sugar and more Salt or Pepper, if needed. Stir in Heavy Whipping Cream and Parmesan, if using. You can also add the Butter here, if you didn't add it earlier. Heat until hot again, and serve.

Enjoy!