Start by cutting the sushi-grade tuna into small, bite-sized pieces. In a mixing bowl, add the tuna pieces with soy sauce, sesame oil, rice vinegar, and sesame seeds. Gently fold the mixture to ensure the tuna is evenly coated. Cover with plastic wrap and let it marinate in the refrigerator for about 10 minutes.

While the tuna marinates, take a large serving platter and arrange a generous layer of tortilla chips in a single, even layer.

Once the tuna has marinated, remove it from the refrigerator and gently spoon the marinated tuna over the tortilla chips.

Next, scatter diced avocado and chopped cucumber over the tuna-laden chips, followed by fresh cilantro.

Finally, drizzle the Bang Bang sauce or chipotle mayo liberally over the entire platter. Serve immediately.