Use a large pot or Dutch oven and heat olive oil over medium heat.
Add minced garlic and sauté until lightly brown and fragrant. About 1-2 minutes.
Add tomatoes and basil. Bring to a boil. Reduce heat to medium-low and simmer for 20 minutes.
Use a hand blender (or transfer into a food processor) and puréee until smooth. Season to taste with salt and pepper. OPTIONAL: Add a tablespoon of sugar.
Notes
Adding a tablespoon of sugar can enhance the tomato's natural sweetness, but it is not necessary and not included in the calorie count.