Sweet potato and carrot soup - packed with flavour

I love this soup. It is a recipe from a Terence Stamp cookbook.

The great colour and flavour come from the spices. As well as the sweet potato, carrot and onion it has cardamon, coriander seeds, turmeric, bay leaf, lemon juice, black pepper, chopped tomatoes and vegetable stock. Lovely. The photo doesn't do it justice.