01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper for easy cleanup.
02 - Toss zucchini rounds with olive oil, salt, pepper, and smoked paprika in a large bowl until evenly coated. Spread in a single layer on the prepared baking sheet.
03 - Roast zucchini for 10-12 minutes until slightly golden and tender but still firm enough to hold toppings. Avoid overcooking to prevent mushy texture.
04 - While zucchini roasts, combine shredded chicken breast with BBQ sauce in a mixing bowl. Stir thoroughly until chicken is evenly coated with sauce.
05 - Remove zucchini from oven. Carefully rearrange rounds close together on the baking sheet, slightly overlapping if needed, to create a solid nacho base.
06 - Distribute BBQ chicken evenly over zucchini rounds. Sprinkle shredded cheddar or Monterey Jack cheese generously across the top.
07 - Return baking sheet to oven and bake for 5-7 minutes, or until cheese is fully melted and bubbly. Watch closely to prevent burning.
08 - Remove from oven. Top nachos immediately with diced cherry tomatoes, red onion, jalapeño slices, and fresh cilantro.
09 - Drizzle sour cream over the top and serve with fresh lime wedges on the side for squeezing.