Classic American Pizza Sauce

In a 2-quart saucepan, on a medium flame, add the olive oil, onions, and salt and sauté until translucent. Do not brown the onions. Add the garlic and oregano to the saucepan, and cook for another minute. Again, do not brown the garlic, which will give the sauce a bitter flavor. Add the tomato puree, and the rest of the ingredients. Simmer on a low for 20 minutes, stirring occasionally. Remove from heat, and cool completely before refrigerating. The sauce should store well for at least 5 to 7 days.