Can you use canned tomatoes instead of fresh tomatoes?

Yes, absolutely! However, since the canned tomatoes usually have a decent amount of citric acid added to them to be safely preserved, the flavor of the sauce will also be a lot more acidic and not as sweet. The plus side is that you can make this sauce even when tomatoes aren't in season and you don't have to cook it as long if you use canned tomatoes.

No garlic in tomato sauce? That can't be right!

I know, I know. This is very unconventional and, to be honest, I don't think I've ever made tomato sauce without garlic until this time. My mom shared this with me and I decided to trust her. It was a game changer. I love garlic with tomatoes, but I loved the flavor with just the sweet, sauteed onions. Just give it a try - you can always add some garlic in later, if you like. Saute the garlic in some oil for 30 seconds - 1 minute until fragrant, then pour in the sauce.

Can this tomato sauce be preserved/canned?

Per the canning standards, tomato products need an acid to be canned safely. (That's why canned tomatoes have citric acid added to them.) I personally prefer the flavor of this sauce without lemon juice, citric acid or vinegar, so I choose not to can it. So that's why I simply store some of the sauce in my refrigerator and the rest I put in my freezer.

Easy Tomato Onion Sauce

Name: Easy Tomato Onion Sauce
Prep time: 30 min
Cook time: 2 h 30 min
Total time: 3 h
Ingredients: 6 lbs tomatoes, peeled, seeded and cored (cut into 4-6 pieces); 3 lbs onions, sliced into half circles; 1/4 cup olive oil; salt, ground black pepper, to taste; fresh herbs, for serving (basil, parsley, etc.)

Easy Tomato Onion Sauce

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This easy tomato onion sauce is made with just 3 ingredients – onions, tomatoes and olive oil. The onions are cooked until they are tender and sweet, then simmered in the tomatoes. It’s delicious as a pasta sauce, but I also love adding it to many other recipes.

Author: Olga's Flavor Factory
Prep Time: 30 min
Cook Time: 2 hours 30 min
Total Time: 3 hours
Yield: 10 cups 1x

Ingredients

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6 lbs tomatoes, peeled, seeded and cored (cut into 4–6 pieces)

3 lbs onions, sliced into half circles

1/4 cup olive oil

salt, ground black pepper, to taste

fresh herbs, for serving (basil, parsley, etc.)

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Instructions

Prep the tomatoes by washing, coring and slicing them into quarters. (I like to peel the tomatoes and remove the seeds first, but you can skip this step if you don’t mind the seeds and skin. This is a personal preference.)
Slice the onions into half circles.
Heat the oil until shimmering, then add the onions. Season to taste with salt and ground black pepper. Cook on medium low heat until soft and turning slightly golden. (This will take about 15 – 30 minutes, depending on the size of your pot – if it’s wider, it will be faster, since there is more surface area for the onions to cook and for the excess liquid to get concentrated and evaporate.) (Keep the pot covered at first so that the onions cook through faster, then uncover, half way through, so the onion liquid will cook off faster.
Add the tomatoes with the tomato juice. Season with salt and ground black pepper as well. Bring everything to a boil, reduce the heat to a simmer and cook, covered, for about 2 hours.
Puree the sauce with an immersion blender or a regular blender, in batches, until it is the consistency that you like.
Add fresh herbs before serving.
To store, keep it in the refrigerator for about a week or freeze for up to 6 months.

Keywords: easy tomato sauce, homemade tomato sauce, homemade tomato sauce with fresh tomatoes, tomato onion sauce

Find it online: https://www.olgasflavorfactory.com/recipes/easy-tomato-onion-sauce/