Pork & chilli lettuce cups

Name: Pork & chilli lettuce cups
Prep time: 25 min
Cook time: 15 min
Total time: 40 min
Cuisine: Asian
Ingredients: 1 tbsp vegetable oil; 1 shallot thinly sliced; 1 lemongrass stalk finely chopped; 4 garlic cloves grated; 1 birds-eye chilli finely chopped; 500g pork mince; 1 tbsp fish sauce; 1 tsp dark brown soft sugar; 2 limes juiced; 2 Little Gem lettuces leaves separated; thinly sliced spring onions shredded carrots, finely chopped coriander leaves and mint leaves, to serve