Heat up a cooking pot with water and wait for it to bubble. Place rinsed tomatoes into the hot water and time it, the tomatoes need to blanch* or until you can see cracks on the tomato skin. Take from the heat and place immediately into ice water to stop the cooking process. The peel will get off easily now and it can be used in this tomato sauce recipe. BUT increase the quantity of tomato sauce added because canned tomatoes contain tomato sauce which is missing when you use fresh tomatoes. *To blanch means to cook for a very short time.