Heat the olive oil in a large frying pan over medium-high heat. Add the onions and saute until translucent. Add the garlic and cook and stir another 2 to 3 minutes.
Stir in the tomatoes, red pepper flakes, and Italian seasoning. Season with salt to taste. Cook until completely heated, approximately another 2 to 3 minutes.
For a smooth sauce, place mixture in your blender or food processor and process until texture that you want.
Makes approximately 3 1/2 cups (enough for 4 to 6 servings).
* Use only top-quality canned tomatoes in this recipe. Using poor quality canned tomatoes can leave an acidic taste in your mouth
Basic Tomato Sauce Recipe: https://whatscookingamerica.net/Sauces_Condiments/BasicTomatoSauce.htm