In a large sauce pot add in your chopped onions, peppers, garlic, and one tablespoon olive oil. Sauté for about 2 minutes. Add in your ground beef. Stirring frequently, breaking up your meat while browning. Once your meat is browned add salt and pepper.
Add in your four cans of stewed tomatoes and one large can of tomato sauce. Bring to a low boil then reduce to a simmer.