1. **Heat the olive oil** in a saucepan over medium heat.
2. **Add the minced garlic** and sauté for 1-2 minutes until fragrant (be careful not to burn it).
3. **Stir in the crushed tomatoes** (or tomato sauce), oregano, basil, and sugar (if using).
4. **Season with salt, pepper, and red pepper flakes** to taste.
5. **Simmer the sauce** on low heat for about 15-20 minutes to allow the flavors to meld. Stir occasionally.
6. Let the sauce cool before spreading on pizza dough. This sauce can be made ahead and stored in the fridge for up to a week.
