Heat 2 tablespoons of olive oil in a large pan, add the sliced garlic, basil, sugar, salt and pepper, and half of the finely chopped onion. Sweat down until golden brown then add the cherry tomatoes and mix well until soft and an attractive glazed colour is achieved.
In another large pan, heat 2 tablespoon of olive oil. Add the other half of the onion and basil stalks and fry for 4-5 minutes until the onion has softened. Pour the Seriously Good Tomato, Black Olive & Mixed Herb sauce into the pan, then fill the jar with water and add this to the pan.
Stir well, bring to the boil and then leave to simmer for 15 minutes.
Mix the contents of both pans together. Blend the soup until smooth and season to taste.
For an extra special finish heat a tablespoon of oil in a frying pan, add the drained capers and fry for 2-3 minute until crisp. Scatter the capers over the soup along with a drizzle of olive oil just before serving.