Super Easy and Tasty Home-made Tomato Sauce

Last night I tried a new recipe for a really simple, yet very tasty tomato sauce. The best thing is that it only has three ingredients. Yes, you heard that right. And they are ingredients you most likely already have at home: canned tomatoes (I used diced since I prefer smoother sauce), butter, and 1 onion. S said he thinks it is better than all the store bought sauces we have bought in the past. So....definitely a success!