Lobster and Pineapple Salad with Basil and Mint

Name: Lobster and Pineapple Salad with Basil and Mint
Ingredients: 2 (1 1/4-lb) live lobsters; 1/2 teaspoon salt; 1/4 teaspoon black pepper; 2 firm-ripe baby pineapples with leaves, halved lengthwise; 1/4 cup peanut or vegetable oil; 1 garlic clove, smashed; 2 tablespoons fresh lime juice; 1 tablespoon Asian fish sauce; 1 tablespoon sugar; 1 small shallot, thinly sliced; 1 red bell pepper, cut into 1/4-inch dice; 1 teaspoon minced fresh serrano chile, including seeds; 3 tablespoons chopped fresh mint; 2 tablespoons chopped fresh basil; Special equipment: a serrated grapefruit knife