Here's my handy dandy tomato sauce recipe that I got from a friend's Italian mom in New York.
1 tbsp olive oil
1 onion, chopped
2 cloves garlic, chopped
Saute onion and garlic in oil over very low heat until cooked translucent. Make sure there are no brown bits in the onion. If there are, pick them out. Very important. Brown bits in the onion will make the sauce bitter. This may take 40+ minutes.
Add:
2 c. carrots, chopped fine
1 can diced tomatoes, pureed
2 cans diced tomatoes
1 can tomato paste
1 can water
(It's important here to use *good quality* diced tomatoes and tomato paste. I use Contadina ones most of the time, or another brand that I get at Whole Foods (It's a yellow tin, and they're imported from Italy). When I have them I've used home canned, but my garden isn't big enough any more to produce enough tomatoes for canning, so mostly I rely on storebought. Whatever you do, but don't buy generic or store brand. I can taste the difference - I promise!)
Cook slowly over low heat until reduced by at least 1/3. This will take 3-ish hours.
Add:
10-12 leaves basil, chiffonade
Salt and pepper (to taste)
Sugar (to taste - start with 1 tbsp)
Optional: 2 cups chopped veggies (mushrooms, zucchini, etc.)
Optional: italian sausage, removed from casing, browned and drained
Simmer for another hour or so.
Remove from heat. Can be served immediately but is better if left overnight for flavors to blend.
I routinely double or triple this recipe and then freeze it in 1 quart freezer bags. I make it up to the point of adding the meat and veggies and then freeze it. When I need a quick topping for just about anything, the sauce can be thawed in the microwave in an instant. And you can add the veggies, or the meat, or meatballs, or whatever, and simmer it for a little on the stove top to blend together a bit.
I also will put a quart of this on the stove, add a little oregano, and simmer it down even thicker to use as a base for pizzas or calzones. Mmm.
This is hands-down the best pasta sauce recipe I've ever made, and I've tried dozens of them.
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