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Bring a large pot of water to boil, once boiling, salt it generously and add the pasta, stirc and cook according to package cooking times.
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Meanwhile, in a large sauté pan, add 1 tablespoon of olive oil and warm over a medium-high heat.
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Add the onions, celery, carrots, bell pepper, and garlic.
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Cook for 3-4 minutes or until the vegetables begin to soften.
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Add the zucchini and mushrooms, cook for an addition 3-4 minutes. Add the remaining olive oil if needed.
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Season with salt and pepper.
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Remove from heat (to avoid splattering) and add the diced tomatoes and the crushed tomatoes, mix well. Return to heat.
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Add the basil, oregano, sugar and tomato sauce. Stir well, allow to heat through and taste for seasoning. Adjust the salt, pepper, and sugar if need be.
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Bring to a high simmer while stirring constantly, then reduce the heat to low and allow it to sit, stirring occasionally while the noodles finish.
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Once the noodles are done, serve immediately and garnish with red pepper flakes and/or parmesan cheese-both optional.