How can i make a spaghetti sauce?

Put the stewed tomatoes and tomatoe sauce togther in a pan.Add any of these :Salt, pepper, onion, garlic, oregano, basil, parsely, italian seasoning. Look in your spice cabinet and just start adding things. I always cook some sweet onion and galic in olive oil then add the sauces and simmer till warm and add meatball. Hope that helps!!