Pork Meatball Banh Mi

Name: Pork Meatball Banh Mi
Ingredients: 1/4 cup rice wine vinegar; 2 tablespoons sugar; 1 1/2 teaspoons kosher salt; 1/2 cup julienned carrot (2 inches long); 1/2 cup julienned daikon (2 inches long); 1 pound ground pork; 1 tablespoon chopped fresh cilantro; 1 tablespoon soy sauce; 2 teaspoons cornstarch; 1 teaspoon sugar; 1/4 teaspoon kosher salt; 2 cloves garlic, grated; 2 green onions, thinly sliced; 1 tablespoon vegetable oil; 2 French baguettes, cut into 4-inch pieces; Hoisin, sriracha and mayonnaise, for serving; 4-inch-long thin slices seedless cucumber, fresh cilantro sprigs and jalapeno sliced on an angle, for topping