Heat olive oil in a saucepan over medium heat. Add minced garlic and sauté for 30 seconds until fragrant (avoid browning).
Add crushed tomatoes, tomato paste, oregano, basil, sugar, salt, black pepper, and red pepper flakes. Stir well.
Reduce heat to low and simmer for 10–15 minutes, stirring occasionally, until the sauce thickens.
For a smoother texture, blend with an immersion blender or transfer to a countertop blender.
Let the sauce cool before spreading on pizza dough. Store leftovers in an airtight jar for up to 1 week or freeze for 3 months.