Cut fish into 4 pieces and soak in water for 70 minutes. Cut pork butt into 4 pieces. Prepare luau leaves by stripping outer skin of stem and leaf veins to prevent itching in throat when consumed. Wash and remove tough ribs from Ti leaves. Lay 2 ti leaves on cutting board. Place 4 luau leaves in center. Place a piece of pork and a piece of fish on luau leaves.