Prepare the Chicken: Season the chicken on both sides with salt and pepper.
Set Up Breading Station: Place the flour in one shallow bowl, beaten eggs in a second bowl, and combine the panko and traditional breadcrumbs in a third bowl.
Bread the Chicken: Dredge each piece of chicken in flour, then egg, then the breadcrumb mixture, pressing gently to adhere.
Make the Sauce: (Let breaded chicken rest for a moment and get your sauce going). In a saucepan, heat the oil over medium heat. Add the minced shallots and cook until softened, about 2–3 minutes. Stir in the tomato paste and cook for 1 minute. Add the crushed tomatoes (I usually add a bit of water to the can and add that as well), brown sugar, seasoning, and salt, then simmer for 10–15 minutes until slightly thickened.
Fry the Chicken: Heat oil in a large skillet over medium-high heat. Fry the chicken in batches until golden brown and cooked through, about 3–4 minutes per side. Transfer to a wire rack and keep in a warm oven.
Broil the Cheesy Sauce (Special Step): Spoon a ladel or two of the marinara into a small nonstick skillet. Sprinkle the mozzarella and Parmesan evenly over the top. Place under the broiler until the cheese is melted, bubbly, and lightly golden.
Finish the Chicken: Pour the broiled cheesy marinara generously over the crispy chicken pieces.
Serve: Serve immediately while hot and crispy.