3.Increase heat to high and add chicken. Cook, stirring, 3-4 minutes, until lightly browned.
4.Pour in stock, simmer 1-2 minutes, until reduced. Stir in cream and bring to the boil. Reduce heat to low and simmer 4-5 minutes, until thickened slightly.
5.Add pasta and tomato to pan. Stir on low heat, 1-2 minutes, to heat through. Add avocado and warm gently, stirring, 1 minute. Serve topped with basil leaves and accompanied with crusty bread.
Be careful not to overheat the avocado as it may change colour or lose its shape.