Add the onion, carrot, celery and garlic to the Thermomix bowl. Chop for 5 seconds / speed 5.
Scape down the bowl. Add the olive oil to the bowl. Saute the vegetables for 3 minutes / 100 degrees / speed 1.
Add the stock, canned tomatoes, fresh tomatoes, sugar and season with salt and pepper. Cook for 25 minutes / 100 degrees / speed 1.
Blend 1 minute / speed 9.
Serve in bowls sprinkled with basil leaves and freshly ground black pepper.
