Place tenders into a large zip-top bag or bowl. Add several tablespoons of blackened seasoning and a few tablespoons of oil. Mix to coat them evenly, making sure they are well seasoned on all sides.
Cook chicken either in an oiled skillet over medium-high, or grill the chicken, about 3 minutes per side flipping just once.
As chicken cooks make your butter topping by combining all butter mixture ingredients in a small bowl. Heat for 30 seconds or until butter melts, then stir to combine.
If needed, slice the sliders horizontally using a serrated knife. Place them cut side up onto a baking sheet and toast under a broiler until golden brown, just a few minutes.
Flip the top buns so the domed tops are facing up and leave them beside the bottom buns on the pan. Assemble the sliders by first adding a squeeze of mayo to all of the bottom buns.
Add the chicken, scattering it evenly so each slider gets at least one chicken tender.
Add a dollop of the golden honey mustard, then place cheese over the chicken.
Spread the top buns with the butter mixture. Add baking sheet back into the broiler for another minute or two until cheese softens and the top buns are slightly toasted.
Top the sliders with bacon, tomatoes, red onion, lettuce, and another drizzle of the honey mustard. Place the top buns over the sandwiches, slice to separate them and serve.