1. Soak gelatine in 1\4 cup of water.
2. Combine watermelon juice with lime juice, Worcestershire sauce, chilli sauce, sugar and salt.
3. Dissolve gelatine over a slow flame and to the watermelon juice.
4. Place in refrigerator till it begins to thicken.
5. Meanwhile, blanch and peel the tomatoes, remove the seeds and chop the flesh.
6. Chop the capsicum (discard seeds) Cut the cucumber in half length wise,( do not peel) discard the core and chop.
7. Sprinkle the chopped cucumber with a little salt and reserve.
8. When the watermelon mixture is half set, squeeze out the liquid from the cucumber and mix with rest of the chopped ingredients.
9. Add salt to taste and mix with the half set watermelon jelly.
10. Pour in a mould and leave in the refrigerator to set.
11. Unmould and serve garnished with lettuce leaves.

Note:
Blend enough watermelon pieces in a mixer to get 400ml juice.

Serves: 4 to 6