Japanese panko bread crumbs are a great alternative to the regular bread crumbs they fry up very light and crispy. Use which ever you have on hand or prefer. Also, if you want a less fat version, you can certainly bake the chicken breasts instead of frying them!
Pat chicken dry. Cut the the breasts in half lengthwise. Pound them into an even thickness. Season with salt and pepper.
In a bowl, combine the breadcrumbs and parmesan cheese. In another bowl, beat the egg(s) (start with one egg and beat another if needed when dredging) and set aside.
Dip the chicken breasts in egg and then dredge them, one a time, in the breadcrumb/cheese mixture. Shake off any excess bread crumb coating.
In large skillet or frying pan, heat about 1/2 inch of oil over medium-high heat to about 350°F, then add the chicken. Cook for about 3 minutes on each side, or until the chicken is golden and cooked through. Fry in batches if needed to keep from crowding the pan.
Remove the chicken from the oil and briefly drain on paper towels. Top the cooked chicken with hot marinara sauce, mozzarella cheese and garnish with parsley.
Grill or toast the hamburger buns, if desired. Layer lettuce, parmesan chicken, and fresh basil. If desired, top with some extra sauce and enjoy!