In 5-quart Dutch oven, heat corn oil over medium heat. Add onion, garlic and parsley. Cook, stirring, 1 minute.
In a blender container place tomatoes; cover. Blend on high speed for 30 seconds or until chopped. Add to onion mixture. Stir in the remaining ingredients. Bring to a boil. Reduce heat and simmer, stirring occasionally, 45 minutes. Serve over spaghetti.
