Chicken Stock Concentrate

Our answer

Nigella uses concentrated liquid stock in some recipes as it is similar to stcok cubes but in liquid form and so doesn't need to be dissolved and can be used in small quatities easily. In the UK it is easiest to find the Knorr Touch Of Taste concentrated liquid stock. This can be found in most major supermarkets (Tesco, Sainsbury's and Waitrose) in the same section as the stock cubes. Note that the concentrate should be stored in the fridge once it has been opened.

Celery salt is a mixture of ground celery seed and salt. It is often used to add an extra touch of savoriness when seasoning dishes, and also in bloody mary cocktails. In the UK you can find celery salt in the spice aisle of most major supermarkets, either as an own-brand (own label) product or you can look for the Bart's or Schwartz brands.