Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Cut the chicken breasts horizontally to create thin cutlets. Flatten them slightly with a meat mallet for even cooking.
Set up a breading station: place the flour in one dish, beat the eggs in another, and mix the breadcrumbs, Italian seasoning, garlic powder, salt, and pepper in a third dish.
Dredge each chicken cutlet in flour, shaking off excess, then dip into the beaten eggs, and finally coat with the breadcrumb mixture.
Heat a drizzle of olive oil in a large skillet over medium heat. Add the breaded chicken cutlets and cook for about 4-5 minutes on each side, until golden brown and cooked through.
Once cooked, transfer the chicken to the lined baking sheet. Spoon marinara sauce over each cutlet and sprinkle with mozzarella cheese.
Bake in the preheated oven for about 10 minutes, or until the cheese is melted and bubbly.
While the chicken is baking, prepare the slider buns by lightly toasting them if desired.
Assemble the sliders by placing a chicken cutlet on each bun. Add extra marinara sauce if desired and garnish with fresh basil leaves.
Serve the sliders warm and enjoy!