In the bowl of a food processor, combine the peanut butter, coconut milk, soy sauce, lime juice, hot sauce, and sesame oil, and process on high speed.
Place tuna in a large bowl. Add the red onions, seaweed, macadamia nuts, cilantro, and lime juice.
Pour the peanut butter mixture over the tuna and combine. Season with sesame oil, soy sauce, and Hawaiian salt, to taste. Serve on top of wonton chips or wrap in lettuce leaves.