Part 1: Preparing the Crispy Chicken Cutlets

1. Set Up Your Breading Station: This is a classic three-step process. Prepare three shallow dishes or pie plates. In the first dish, whisk together the all-purpose flour, salt, and pepper. In the second dish, beat the eggs until they are uniform. In the third dish, combine the Italian breadcrumbs and the 1/2 cup of grated Parmesan cheese, mixing them well. Arrange these dishes in a line for an efficient workflow: flour, eggs, then breadcrumbs. Place a large plate or a baking sheet at the end of the line for the breaded chicken.

2. Prepare the Chicken: If your chicken cutlets are thicker than 1/4 inch, place them between two sheets of plastic wrap and gently pound them to an even thickness with a meat mallet or a heavy rolling pin. This ensures they cook quickly and evenly. Pat each cutlet dry with a paper towel; this helps the flour adhere better.

3. Dredge and Coat: Working with one cutlet at a time, first dredge it in the flour mixture, shaking off any excess. Next, dip it completely into the beaten eggs, allowing the excess to drip off. Finally, press the cutlet firmly into the breadcrumb-parmesan mixture, ensuring it’s thoroughly coated on all sides. Place the coated cutlet on the clean plate or baking sheet. Repeat with all remaining chicken cutlets.

4. Pan-Fry the Chicken: Heat the vegetable oil in a large skillet or frying pan over medium-high heat. The oil is ready when a pinch of breadcrumbs sizzles immediately upon contact. Carefully place 2-3 chicken cutlets in the hot oil, being sure not to overcrowd the pan. Fry for 3-4 minutes per side, or until golden brown, crispy, and cooked through. The internal temperature should reach 165°F (74°C).

5. Drain and Cool: As the chicken is cooked, remove it from the skillet and place it on a wire rack set over a baking sheet. This allows air to circulate and prevents the bottom from becoming soggy while letting excess oil drip away. Continue frying the remaining chicken in batches, adding a little more oil to the pan if needed. Once all the chicken is cooked, let it rest for a few minutes before chopping.

6. Chop the Chicken: Once the chicken is cool enough to handle, chop it into bite-sized, 1/2-inch to 1-inch pieces. This is the key that transforms it from a standard chicken parm into a perfect sandwich filling.

Part 2: Assembling the Party-Sized Sandwiches

1. Preheat and Prepare the Pan: Preheat your oven to 375°F (190°C). Lightly grease a large, rimmed baking sheet or a 9×13-inch baking dish.

2. Prepare the Buns: Do not separate the individual slider buns. Using a large serrated bread knife, carefully slice the entire slab of buns in half horizontally, creating a single large top piece and a single large bottom piece. Place the entire bottom slab of buns onto your prepared baking sheet or dish.

3. Layer the Flavors: This is where the magic happens. Build your giant sandwich in the following order:

   • Optional Cheese Barrier: For extra protection against sogginess, lay the 8 slices of provolone cheese over the bottom buns. This creates a delicious barrier between the bread and the sauce.

   • The Chicken: Evenly distribute the chopped, crispy chicken pieces over the bottom buns (or provolone layer), covering the entire surface.

   • The Sauce: Spoon the warmed marinara sauce over the chicken. Try to cover the chicken evenly without completely drenching the bread.

   • The Mozzarella: Generously sprinkle the sliced or shredded mozzarella cheese over the sauce-covered chicken, ensuring every inch is covered for that perfect cheese pull.

4. Place the Top: Carefully place the top slab of buns over the cheese layer, lining it up with the bottom.

Part 3: The Final Bake to Golden Perfection

1. Prepare the Garlic Butter Topping: In a small, microwave-safe bowl, melt the stick of butter. Whisk in the minced garlic, dried Italian seasoning, chopped fresh parsley, and the 2 tablespoons of grated Parmesan cheese.

2. Brush the Buns: Using a pastry brush, generously brush the garlic herb butter mixture all over the top of the buns. Make sure to cover the entire surface and let some drip down the sides. This step creates a golden, fragrant, and irresistibly crispy crust.

3. Bake: Cover the baking sheet loosely with aluminum foil. This prevents the tops from burning while the cheese melts and the inside heats through. Bake in the preheated oven for 15 minutes.

4. Final Browning: After 15 minutes, carefully remove the aluminum foil. Return the sandwiches to the oven and bake for another 5-10 minutes, or until the cheese is completely melted and bubbly, and the tops of the buns are golden brown and toasted.

5. Rest and Serve: Let the sandwiches rest for 5 minutes before serving. This allows the cheese to set slightly, making them easier to cut or pull apart. Use a sharp knife to cut along the lines of the individual buns, or simply let your guests pull their own sandwiches from the tray.