Grapefruit prawn salad

Name: Grapefruit prawn salad
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: Asian
Ingredients: 350g peeled, cooked prawns (about 16 or 800g whole prawns); 1 pink grapefruit, peeled and segmented; 1 long green chilli, sliced; 1 bunch of mint, leaves picked; 1/2 cup coriander leaves; 2 Lebanese cucumbers, cut thinly on the diagonal; 50g shredded coconut; 60g roasted peanuts; 2 teaspoons caster sugar; juice of 2 limes; 2 tbs fish sauce