Fried Spanish Mackerel with Cilantro Sauce

Name: Fried Spanish Mackerel with Cilantro Sauce
Ingredients: 5 garlic cloves, thickly sliced; 3 Thai chiles or 1 large jalapeño, thickly sliced; 3 medium shallots, 1 thickly sliced, 2 thinly sliced; 3 tablespoons sugar; 3 packed cups cilantro leaves and small sprigs; 3 tablespoons Asian fish sauce; 3 tablespoons fresh lime juice; 1/4 cup plus 2 tablespoons water; 4 ounces fresh pork fat, cut into small dice, or 1/2 cup rendered lard; Six 6-ounce Spanish mackerel fillets with skin; Salt and freshly ground pepper