Preheat the oven: Set to 425–450°F (220–230°C). Hotter is better for a crisp, bubbly finish.
If you have a sheet pan or pizza stone, place it in the oven to preheat.
Prep the chicken: Toss the chicken with half the BBQ sauce and a pinch of salt, pepper, and optional smoked paprika. This seasons the meat and keeps it juicy.
Brush the base: Lightly brush flatbreads with olive oil. Spread a thin layer of BBQ sauce over each, leaving a small border.
Add toppings: Sprinkle on most of the cheese.
Scatter the sauced chicken evenly, then add red onion. Finish with the remaining cheese for a melty “blanket.”
Bake: Transfer flatbreads to the hot sheet pan or stone. Bake 8–12 minutes, until the cheese is melted and browned in spots and the edges are crisp.
Finish fresh: Let rest 1–2 minutes.
Top with chopped cilantro and a small squeeze of lime. Add a drizzle of extra BBQ sauce if you like.
Slice and serve: Cut into wedges. Serve hot with a simple side salad or steamed veggies.