Heat the oil in a saucepan to medium heat. Add garlic, stirring constantly, and cook for 1 minute or until fragrant. Be careful not to let it brown. Add the tomato paste, oregano, and bay leaves,if using, and cook for an additional minute or so until fragrant.
Add the canned tomatoes, a generous pinch of kosher salt, and generous grind of black pepper. Stir and bring to a low simmer. Simmer for 30 to 45 minutes. Season to taste with salt and pepper and use or store for later.