Pork Meatball Banh Mi

Name: Pork Meatball Banh Mi
Cuisine: Asian, Vietnamese
Ingredients: 2/3 cup mayonnaise; 2 green onions, finely chopped; 1 tablespoon hot chili sauce (such as sriracha)*; 1 pound ground pork; 1/4 cup finely chopped fresh basil; 4 garlic cloves, minced; 3 green onions, finely chopped; 1 tablespoon fish sauce (such as nam pla or nuoc nam)*; 1 tablespoon hot chili sauce (such as sriracha); 1 tablespoon sugar; 2 teaspoons cornstarch; 1 teaspoon freshly ground black pepper; 1 teaspoon coarse kosher salt; 2 cups coarsely grated carrots; 2 cups coarsely grated peeled daikon (Japanese white radish)**; 1/4 cup unseasoned rice vinegar; 1/4 cup sugar; 1 teaspoon coarse kosher salt; 1 tablespoon Asian sesame oil; 4 10-inch-long individual baguettes or four 10-inch-long pieces French-bread baguette (cut from 2 baguettes); Thinly sliced jalapeño chiles; 16 large fresh cilantro sprigs