Herby Tomato Soup

Ingredients

• 2 cans tomato
• 1 pint chicken stock
• 1 large onion (chopped)
• 1 level teaspoon ground cumin
• 3 teaspoons dried oregano
• 2 teaspoons dried basil
• 1/3 tube tomato puree
• 1 tablespoon parsley (chopped)
• 1 tablespoon coriander (chopped)
• 150 ml double cream
• a little butter