In a large sauce pan, pour olive oil. Add grated onion and cook on medium heat until translucent. Add garlic and cook for 1 more minute.
Add dried oregano and stir to mix thoroughly. Add tomato paste and cook another 2 minutes, until the tomato paste darkens slightly. Now add crushed tomatoes, wine and parmesan cheese rind. Stir until combined thoroughly. Turn heat to simmer and cook, stirring occasionally, for one hour.
This sauce is delicious served over breaded chicken, breaded eggplant, pasta, and meatballs, It is a terrific and classic marinara sauce.
Sauce can be frozen for up to 3 months.