Heat olive oil in a large saucepan over medium heat.
Add minced garlic and sauté for 30–60 seconds until fragrant (do not brown).
Stir in crushed tomatoes and tomato paste until fully combined.
Add salt, black pepper, oregano, basil, and sugar if using.
Bring the sauce to a gentle simmer, then reduce heat to low.
Let it simmer uncovered for 30–35 minutes, stirring occasionally, until thickened.
For a smoother sauce, blend with an immersion blender or transfer carefully to a blender.
Stir in fresh basil at the end for a bright finish.
Serve warm over pasta, use for pizza, or store for later use.