Cook the chicken tenders according to package directions.
Prep the sliders. Preheat the oven to 350°F or 177°C. Grease a casserole dish and place the bottom half of the slider buns in the dish. Top with cooked chicken tenders, pasta sauce, mozzarella, and Parmesan. Add the top of the slider buns.
Make the garlic butter sauce. Mix the melted butter with garlic powder. Pour the mixture over the buns and sprinkle with Italian seasoning.
Bake. Cover the dish with foil and bake for 10 minutes. Remove the foil and continue baking for an additional 10 minutes.