Chicken and Coconut Shumai

Name: Chicken and Coconut Shumai
Ingredients: 1 pound ground chicken; 1/4 cup unsweetened coconut milk; 1/4 cup coarsely shredded carrot; 2 Thai chiles, minced; 2 tablespoons chopped basil; 2 tablespoons Asian fish sauce; 2 tablespoons sugar; 2 teaspoons fresh lime juice; 1 garlic clove, minced; 1 large egg, beaten; 1 small shallot, minced; 1/2 teaspoon minced fresh ginger; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly ground pepper; 40 wonton wrappers; Green leaf lettuce leaves, for steaming; Sriracha chili sauce, for serving