Remove and discard skin and bones from the rotisserie chicken. Add meat to a large bowl.
Use two forks to shred the meat, or use a stand mixer fitted with the paddle attachment. Run the mixer on low speed.
Add seasoning and stir well to combine. Then stir in 1/3 cup of barbecue sauce.
Spray your casserole dish with non-stick cooking spray.
To assemble chicken sliders: Place bottom half of rolls or buns in the casserole dish. Add 1/3 cup of meat to each slider bun (2/3 cup for hamburger buns). Lay cheese slices over the shredded meat. Drizzle remaining BBQ sauce over each, then add tops of rolls/buns. Brush tops with melted butter.
Bake for 15-20 minutes, until sliders are golden on top.
Separate slider buns and serve.
Notes
How to Store and Reheat: Leftovers can be refrigerated for up to 3 days. Store any unused meat separately from the rolls to keep the bread from getting soggy in the fridge.Reheat already-assembled BBQ chicken sliders on a sheet pan at 350°F. oven. 15 to 20 minutes should be plenty to warm them through, while also toasting the buns.