Grilled Pork Shoulder Steaks With Green Pepper Relish

Name: Grilled Pork Shoulder Steaks With Green Pepper Relish
Ingredients: 3 lb. boneless pork shoulder (Boston butt), fat cap trimmed to ¼ if needed, sliced crosswise ½ thick; 6 large garlic cloves; ¼ cup oyster sauce; 3 Tbsp. finely chopped cilantro rootsor stems; 2 Tbsp. fish sauce (such as Megachef, Squid, or Three Crabs); 2 Tbsp. light soy sauce or soy sauce; 2 tsp. white or black peppercorns; 5 large fresh banana peppers, Anaheim chiles, or Cubanelle peppers (about 1¼ lb.); 2 jalapeños; 1 small shallot, thinly sliced; ¼ cup fresh lime juice; 2 Tbsp. coarsely chopped cilantro; 2 Tbsp. Thai fish sauce (such as Megachef, Squid, or Three Crabs); 2 tsp. light brown sugar; Khao Niao (for serving; see recipe)