In a saucepan, heat the olive oil over medium heat.
Add the crushed garlic and sauté for about a minute, without browning.
Carefully pour in the canned tomatoes. Use a wooden spoon to break them up slightly.
Bring the sauce to a simmer, then lower the heat and cook uncovered for about 20 minutes.
Season with salt to taste. Add fresh basil if desired and simmer another 5 minutes.
Use an immersion blender for a smoother texture if you like.