1. Heat the canola oil in a skillet over medium heat, and saute the onion until tender. 2. In a slow cooker, mix the onion and remaining oil, crushed tomatoes, tomato sauce, tomato puree, garlic powder, oregano, basil, salt, sugar, and pepper. 3. Cover slow cooker, and cook sauce 8 hours on Low. ---------------------------------------------------------------------------
Nutrition
Ingredients
