Sauté the onions and garlic in olive oil until the onions are translucent. Add the tomatoes and water.

Bring the sauce up to a boil and then turn down the heat to medium low (not all the way down to low). Add salt and pepper to taste and basil halfway through cooking.

Keep the sauce at a steady simmer for at at least one hour. Don't forget to occasionally stir the sauce to keep it from burning! Serve over your favorite pasta!