Spicy jerk prawn & mango tacos with coconut dressing

Name: Spicy jerk prawn & mango tacos with coconut dressing
Cook time: 15 min
Total time: 15 min
Cuisine: American, Mexican, Latin American
Ingredients: 300g raw peeled king prawn; 1 ½ tbsp Jamaican jerk paste; 400g can black bean , drained and rinsed; 1 large mango , stoned, peeled and diced; ½ red onion , sliced; ½ cucumber , chopped; bunch coriander , leaves roughly chopped; 8 taco shells; ½ tbsp vegetable oil; 2 Little Gem lettuces , shredded; 165ml can coconut milk; zest and juice 1 lime; 2 pinches of sugar