Adapted from: allrecipes.com/recipe/119...
Place tomatoes, tomato paste, parsley, garlic, oregano, salt, and pepper in a food processor; blend until smooth.
Heat oil in a large skillet over medium heat. Add onion and cook until slightly softened, about 2 minutes.
Stir in blended tomato sauce and white wine.
Simmer, stirring occasionally, until thickened, about 30 minutes.
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