Striped Bass Clay Pot

6 tablespoons fish sauce 4 1/2 tablespoons brown sugar 4 tablespoons minced shallots 3 tablespoons minced garlic 1 teaspoon coarse ground black pepper 1 1/2 pounds striped bass 6 small cubes pancetta (about 1 ounce) 1 tablespoon superfine or fine granulated sugar 1 tablespoon minced ginger 1 tablespoon neutral oil 1 1/2 cups fresh young coconut juice (or enough to cover the fish) Salt Chopped scallions, for garnish Fresh cilantro leaves, for garnish Sliced Fresno chiles, for garnish 1 Thai chile, sliced, for garnish