In a large bowl, toss freshly cooked fries with fish sauce, garlic powder, ground coriander, and salt.
Spread half of the cooked, seasoned fries out on a rimmed baking sheet. Cover with half of the cheeses evenly. Top with remaining fries, and then top with the remaining cheeses. Broil on high until the cheese is melted and bubbly, approximately 2 to 3 minutes.
In a small bowl, whisk together Sriracha, mayonnaise and lime juice.
Top fries with cilantro, peanuts, green onion, avocado and Sriracha mayonnaise. Serve with lime wedges.