Grilled Pork Skewers with Chile Sauce

Name: Grilled Pork Skewers with Chile Sauce
Ingredients: 1/4 cup low-sodium soy sauce; 1/4 cup oyster sauce; 3 tablespoons finely chopped cilantro leaves and stems; 2 tablespoons finely chopped garlic; 2 tablespoons sugar; 1 teaspoon freshly ground black pepper; 1 1/2 pounds pork tenderloin, cut into 16 pieces; 16 (6-inch) wooden skewers, soaked in cold water for 30 minutes; Chile Sauce, recipe follows; 1/2 cup fresh lime juice; 1/4 cup fish sauce; 1 tablespoon soy sauce; 1 fresh Thai red chile, finely diced; 2 teaspoons sugar; 1 shallot, finely diced