Add the olive oil and garlic to a sauce pot and cook over medium heat for 1-2 minutes, or just until the garlic is soft and fragrant.
Add the crushed tomatoes, tomato paste, sugar, salt, basil, oregano, some freshly cracked pepper (10-15 cranks of a pepper mill), and a pinch of red pepper flakes. Stir to combine.
Cover the pot, allow the pot to come to a simmer, then reduce the heat to low, and let simmer for 15 minutes minimum, or up to 30 minutes (I often let it simmer as I prepare my pizza dough).
To freeze this sauce, first cool it completely in the refrigerator, then transfer to quart-sized freezer bags or freezer-safe resealable containers and freeze until solid. Simply reheat over low heat in a sauce pot, with a lid to minimize evaporation, and stirring often, until heated through.