Step 1

Heat olive oil in saucepan over medium until shimmering. Add minced garlic, oregano, and red pepper flakes. Cook for 30 seconds.

Step 2

Add tomatoes and onion powder. Salt to taste. Continue to cook, simmering until reduced to desired consistency. A thinner sauce will be ready after 5-10 minutes of simmering; for a thicker sauce, the full 30 minutes.

Step 3

Note: If you used peeled whole tomatoes, transfer the sauce to a blender or food processor, or use an immersion blender right in the sauce pan, and blend until smooth (or desired consistency). Crushed tomatoes do not need to be blended.