Coat a large saucepan with cooking spray; add oil and place over medium heat until hot. Add onion and garlic and sauté 3 minutes or until tender. Stir in tomato and remaining ingredients; bring to a boil. Reduce heat and simmer uncovered for 30 minutes, stirring occasionally.
Position knife blade in food processor bowl and add 3 cups of tomato mixture. Process until smooth. Add tomato pureé back to tomato mixture in saucepan; bring to a boil. Reduce heat and simmer uncovered for 15 minutes, stirring occasionally.