Thai gazpacho

It was a very hot summer here, so we ate a lot of cold soups. This one turned out very nicely, although if you want it to have a reasonably attractive colour, make sure you use yellow tomatoes, not red ones. Otherwise, though, it's all very tasty. Based on this recipe.

Ingredients:
3-4 large yellow tomatoes, cut into chunks
1 full Noa cucumber, or 1/2 English cucumber, peeled and cut into chunks
1/2 yellow pepper, deseeded and cut into chunks
1 onion
1-2 cloves garlic
1 tbsp lemongrass (paste, fresh, or frozen)
1 thumb-size piece of ginger, peeled and roughly chopped
juice and zest of 1 lime
2 tbsp fish sauce
1 tsp chilli paste OR 1 chilli (or to taste)
mint, (Thai) basil and coriander to taste (should be about 1/2 cup or so)
1/2 a 400ml tin of coconut milk (you can use more too, but keep some for serving)
seasoning

Throw the tomatoes, cucumber, pepper, and onion into a blender and blend. Add the garlic, lemongrass, ginger, lime juice and zest, fish sauce, chilli, herbs and seasoning, and then as much coconut milk as you want (less is more, add little by little until you have as much as you want). Blend the mixture until smooth.

Put in the fridge to cool for a few hours. Serve with some bread on the side.