Cook the onion in a little oil for about 5 minutes. When soft add the garlic. Cook for another minutes, stirring, then add the curry powder and the tin of tomatoes. Add a little water if the tomatoes are too thick. Simmer for 10 minutes.
Add the coriander and using a stick blender, blend the soup.
Mix a tablespoon of milk with the bicarbonate of soda. Pour it onto the soup, followed by the rest of the milk.
Simmer for 5 minutes, keep stirring. There will be quite a few bubbles but they will have disappeared after 5 minutes.
Serve with your choice of bread.
Notes
Nutritional information is approximate and a guideline only.