Preheat the oven to 350 degrees.
Begin by making the Marinara Sauce: in a Dutch oven heat the olive oil on low heat and cook the onions and one tablespoon of the garlic until they're soft. Add the tomatoes, sugar, a tablespoon of the oregano, the cubanelle pepper, chicken stock, a half teaspoon of the kosher salt, and a quarter teaspoon of red pepper flakes. Simmer uncovered while you fry the chicken. Remove the pepper.
Split each breast in half, so that you have 4 thin cutlets. Using a meat pounder, pound them even thinner. Prepare a dredging station with three bowls: fill the first bowl with the flour and a quarter teaspoon each of salt and pepper. Fill the second bowl with the eggs. Fill the third bowl with the breadcrumbs, a quarter teaspoon each of the kosher salt and red pepper flakes, a tablespoon of the minced garlic, the herbs, and one cup of the Parmesan.
Heat a cast iron skillet with a quarter inch of the vegetable oil on medium high heat. The oil is ready when a small piece of chicken sizzles immediately. Dip each piece of chicken in each of the three bowls- first flour, then eggs, and finally breadcrumbs. Fry two cutlets at a time until they're golden brown on each side and cooked through. Drain the chicken on a wire rack over a baking dish.
When all the chicken is cooked. Top them with a spoonful of sauce (you can freeze the rest of the sauce). Then sprinkle on mozzarella, provolone, and a half cup of the parmesan cheese. Bake until the cheese is melted, about 5 minutes.