|1/2 lb fresh tuna or white fish||Juice of 1 lime or lemon|
|1/2 red onion, finely chopped||1/2 green pepper, chopped|
|1 tblsp grated mango (optional)||1 cup coconut milk|
|Handful watercress, chopped (optional)||Couple of slices cucumber|
|Sprinkle of red pepper flakes||1 teasp sugar|
Make sure you have the freshest fish possible - if tuna, choose the lightest flesh. Chop into bite-sized pieces and place in a large serving bowl.
Add all the other ingredients, mix well and leave for a few minutes before serving.