Mussels with Lime Juice and Mirin

Name: Mussels with Lime Juice and Mirin
Ingredients: 1/2 cup freshly squeezed lime juice (about 7 limes); 1/2 cup mirin rice wine; 1 teaspoon Asian fish sauce (nam pla); 1 lemongrass stalk, sliced diagonally 1/8 inch thick; 3 scallions, sliced diagonally 1/8-inch thick; 1 green chile pepper, finely chopped; 2 pounds mussels, cleaned and beard removed; 1/2 seedless cucumber, cut into 1/4-inch dice; Fresh cilantro leaves, for garnish; Fresh basil leaves, for garnish