Open your favorite can of sauce or make a quick marinara sauce following these instructions. Add 2 tablespoon olive oil to the saucepan and bring to medium heat. Add the onions and saute until soft and translucent, about 5 minutes. Then stir in the garlic and crushed red pepper and saute for 30 seconds. Add the tomato paste and combine everything. Saute for 2 more minutes. Pour in the crushed tomatoes and add 1 teaspoon salt and basil. Bring to a simmer and simmer for 30 minutes.
Combine the breadcrumb ingredients. In a medium bowl, whisk the eggs. Slice chicken breasts in half and then cut into thirds to make patties. Dip each patty into the egg and then coat in the breadcrumb mixture, making sure to pat the breadcrumbs on so they stick.
In a cast iron skillet or large skillet, add the olive oil until the bottom of the pan is covered. Bring to medium-high heat. The oil shouldn't be smoking incessantly, but slightly shimmering when it is ready. Add your chicken patties to the oil in batches and fry on both sides for about 4 minutes or until the patty reaches 165℉.
Add the chicken to the bun and top with mozzarella cheese. Place the sliders on an oven safe pan, and place in the oven on broil for 3 minutes or until the mozzarella melts. Garnish with parsley and enjoy!
Notes
Slice the chicken like you're butterflying it or making thin chicken cutlets. Then make the "patties" by cutting those thin slices into thirds.