1. Heat the Olive oil in a Large frying pan and add crushed garlic. Once the garlic begins to colour lightly, add all other ingredients, tomato cans, sugar, black chocolate, salt, onion powder (optional) and pepper.
2. Stir & simmer over medium heat. Reduce heat to low and simmer tomato sauce until it is reduced by about half, stirring occasionally. Check the seasonings add more salt or pepper if required.
3. Store the sauce in a clean jar in the fridge until you use. The sauce also suitable to freeze if you don't use all of them.