Vietnamese Grilled Pork Meatball Sandwiches

Name: Vietnamese Grilled Pork Meatball Sandwiches
Ingredients: 2 tablespoons plus 1 teaspoon vegetable oil, plus more for brushing; 2 large garlic cloves, minced; 2 Thai chiles or 1 large jalapeño, minced; 1 large shallot, thinly sliced; 3 tablespoons rice wine or dry white wine; One 16-ounce can plain tomato sauce; 3 1/2 tablespoons Asian fish sauce; 1 1/2 pounds ground pork; 1/2 cup minced onion; 4 large canned water chestnuts, minced; 3 tablespoons cornstarch; 2 tablespoons chopped cilantro leaves, plus 12 large sprigs; 1 tablespoon Korean-style kimchi (see Note); 2 teaspoons soy sauce; 1 1/2 teaspoons freshly ground pepper; 1/2 teaspoon Asian sesame oil; 1 large egg beaten with 2 tablespoons water; Six 6-inch French bread rolls or pieces of baguette; Quick Pickled Carrots; Hot sauce, for serving