Marinated Grilled Peaches with Sliced Pork

Name: Marinated Grilled Peaches with Sliced Pork
Ingredients: 3 firm-ripe peaches (about 1 1/4 pounds); 1/2 cup granulated sugar; 2 tablespoon fish sauce; 1 tablespoon freshly squeezed lime juice; 1/4 teaspoon freshly ground black pepper; 1 teaspoon minced garlic; 1 teaspoon grated fresh ginger; 1 serrano or jalapeño chile, very thinly sliced crosswise; 1 1/2-2 pound bone-in or boneless pork loin chops about 1 inch thick; Kosher salt; Whole lettuce leaves, such as Little Gem, for serving; Sprigs of mint and cilantro, for serving; Lime wedges, for serving