Gói Bươi ốt - Vietnamese Red Grapefruit Salad

Nùc Mám Dressing

1. 8 tbsp fish sauce
2. 8 tbsp warm water
3. 6 tbsp sugar
4. 2 limes juiced
5. grapefruit juice
6. 2-4 Birdseye chilli finely minced

1. ½ tsp salt
2. 1 kg tiger prawns shrimp, peeled and deveined
3. 2 grapefruits
4. 2 shallots