Preheat oven to 200⁰C
Pour the oil into a baking tray and heat in the oven until the oil is thin and runny
Remove from the oven and add the onions, garlic, fresh tomatoes, salt & pepper and toss so that all the vegetables are covered with oil
Roast the vegetables for 20 minutes, tossing from time to time (roast until the tomatoes and onions show a roasty colour)
In a pot (medium size) pour the tin tomatoes, and chicken stock together, let it simmer over a low to medium heat, add the sugar (helps to balance the acidity) and salt and black pepper and leave to simmer while the tomatoes, onion and garlic roasted in the oven
Prepare the fresh basil (wash) and keep aside
As soon as the tomato mix have finished roasting, mix together in the simmering pot, add everything from the roast mix
Blend everything together to a smooth consistency
Add the fresh basil and blend