Put the tomatoes in a
blender or food processor. Add the tomato puree.
Cut
off 6 thin slices of cucumber for garnish, roughly
chop the remainder and add to the tomatoes with the
spring onions, red pepper, Worcestershire and
Tabasco sauces.
Puree until smooth. Blend in the
yoghurt and thin with a little milk if necessary.
Stir in the rice and season if necessary.
Ladle into
soup bowls and garnish each with a slice of cucumber
and a few chives.