Bring a large pot of water to a boil over high heat. Fill a mixing bowl with ice and water and place close to the stove. Also have a mixing bowl ready. Tomatoes will go from boiling water to ice bath the mixing bowl to blanch and remove the skin.
Core out the stems from the tomatoes and cut a shallow “X” on the bottom of each tomato.
Drop several tomatoes into the boiling water. Cook until you see the skin starting to wrinkle and split – for about a minute. Next move tomatoes from boiling water to the ice bath. When cooled move to the mixing bowl. When all are done empty the boiling water (you’ll use this for the sauce.) Next, use your hands or a paring knife to strip the skins from the tomatoes.
If you like a smooth sauce, pulse tomatoes in a food processor in batches to the consistency you like and transfer to the large stockpot. If you like a chunkier sauce skip processing, roughly chop and place tomatoes in stockpot. Bring the tomato sauce to a simmer over medium heat. Continue simmering for 30 to 90 minutes, stirring occasionally, until the sauce reaches the taste and consistency you like. When finished cooking, stir in lemon juice or vinegar oil and salt. Add more lemon juice or vinegar to taste.
This recipe freezes well.
You can also be creative and add pepper and fresh garlic or herbs such as oregano, basil, parsley, etc. at the end of the cooking.