Pressure Cooker Kalua Pig

Name: Pressure Cooker Kalua Pig
Ingredients: 87.5 grams (3 ounces) kosher salt; 28.3 grams (1 ounce) brown sugar; 62.5 grams (2 ounces) fish sauce; 18.75 grams (.7 ounce) pink salt; 12.5 grams (.4 ounce) whole coriander; 12.5 grams (.4 ounce) black peppercorns; 3.75 grams (.1 ounce) star anise; 2.5 grams (.1 ounce) clove; 5 pounds boneless pork shoulder, wrapped with twine to keep uniform in size; 2 sheets banana leaves, cut to fit pressure cooker; 2 Maui onions, sliced; Two 12-ounce bottles Hawaiian ale; Soy sauce, to taste; 1/4 cup Dijon mustard; 1 teaspoon fish sauce; 1 head butter lettuce, separated into leaves; Red onion slices