01 - Preheat oven to 400°F.
02 - In a mixing bowl, toss the shredded chicken with buffalo sauce until evenly coated.
03 - Arrange tortilla chips in a single, even layer on a large oven-safe baking sheet or platter.
04 - Distribute the buffalo chicken evenly over the tortilla chips.
05 - Sprinkle shredded cheddar and mozzarella cheeses over the entire surface.
06 - Bake for 10 to 12 minutes, or until the cheese is fully melted and bubbling.
07 - Remove from oven and top with sliced green onions, diced tomatoes, crumbled blue cheese if desired, and jalapeño slices.
08 - Drizzle ranch or blue cheese dressing over the nachos and serve immediately.