Chilled Tomato, Watermelon & Cucumber Soup

4 large, ripe tomatoes, peeled and deseeded
3.5 lbs watermelon (preferably seedless), peeled and chopped
4 inch piece of cucumber, peeled and deseeded
2 spring onions, chopped
1 tbsp fresh mint, chopped
Salt and pepper

Instructions:

Blend the tomatoes in a blender and slowly add the cucumber, mint, watermelon and spring onion until the mixture is smooth. Season well.

Allow the soup to chill overnight. Next day, check the seasoning and serve.