Preheat oven to 220°C.
Heat the oil in a frying pan. Add the Knorr Vegetable Stock Pot and stir over gentle heat until stock is dissolved. Remove from heat and add the tomatoes, stir well.
Place tomatoes in a baking dish and roast in oven for 15 minutes.
Remove from oven and leave to cool for 30 minutes.
Combine tomatoes with all remaining ingredients in a large bowl. Chill for 15 minutes or until ready to serve.