01 -  Set grill or grill pan to medium-high heat to ensure consistent cooking temperature. 
 02 -  Combine chicken breasts, olive oil, smoked paprika, garlic powder, salt, and black pepper in a bowl, mixing thoroughly. Allow to marinate for 10 minutes. 
 03 -  Place chicken on the hot grill and cook for 5 to 7 minutes per side until fully cooked and juices run clear. Remove and rest for 5 minutes, then slice thinly. 
 04 -  In a mixing bowl, gently combine diced mango, chopped red onion, diced bell pepper, minced jalapeño, fresh cilantro, lime juice, and salt. Set aside for flavors to meld. 
 05 -  Preheat oven to 400°F. Brush both sides of the flour tortillas with olive oil. Arrange on a baking sheet and bake for 3 to 4 minutes per side until lightly crisped yet flexible. 
 06 -  Begin assembly by placing 1 tortilla on each plate or tray. Spread 2 tablespoons BBQ sauce over each, add sliced grilled chicken, a spoonful of mango salsa, and a sprinkle of cheese if desired. Top with another tortilla. Repeat the layering process, finishing with more salsa and cheese. 
 07 -  Return assembled stacks to the oven for 4 to 5 minutes until cheese melts and layers are thoroughly heated. Garnish with additional cilantro and serve immediately.