How to Make It
Heat the olive oil in a large heavy saucepan. Add the onion, garlic, thyme and oregano and cook over moderate heat for 5 minutes. Stir in the tomatoes, tomato paste, sugar, salt, pepper and 1 1/4 cups of water and bring to a boil. Cover, reduce the heat to low and simmer for 15 minutes. Pass the soup through the fine disk of a food mill.
Rewarm the soup. Add the butter a little at a time, stirring between additions. Pour the soup into 4 soup plates or bowls and drizzle 1 tablespoon of the Basil Oil over each serving.