Follow these step-by-step instructions to create your Chicken Parmesan Sliders:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Chicken: Slice the boneless chicken breasts into thin cutlets for even cooking.
3. Mix Breading: In a bowl, combine breadcrumbs, grated Parmesan cheese, garlic powder, oregano, salt, and pepper.
4. Coat Chicken: Dredge each chicken cutlet in the breadcrumb mixture, pressing gently to adhere the breadcrumbs to the chicken.
5. Heat Oil: In a large skillet, heat olive oil over medium heat.
6. Cook Chicken: Place the coated chicken cutlets in the skillet and cook for 4-5 minutes on each side, or until golden brown and fully cooked.
7. Assemble Sliders: Once cooked, place the chicken on the bottom half of each slider bun.
8. Add Marinara: Spoon marinara sauce over the chicken, followed by a generous sprinkle of shredded mozzarella cheese.
9. Bake: Place the assembled sliders on a baking sheet and bake for 10-15 minutes, or until the cheese is bubbly and melted.
10. Garnish: Remove from the oven and garnish with fresh basil leaves before topping with the other half of the slider bun.

These steps provide a clear process to ensure that your Chicken Parmesan Sliders turn out wonderfully flavorful and perfectly cooked.