1. Place chicken in crock pot. Cover with BBQ sauce. Cook on high for 4 hours. At the end of the cook time, remove chicken from crock pot. Shred. Return to crock pot.
2. Preheat oven to 400°. Place naan flats on baking sheet. Top each flat with about 1/3 c BBQ chicken on bottom, 1 tbsp crushed pineapple, 1/4 c mozzarella cheese, and sprinkle with scallions.
3. Bake for 7-10 minutes. Slice each flat into quarters.
Yields 4 servings