Using the flat side of a meat mallet or a rolling pin, gently pound the chicken breasts between two pieces of plastic wrap so that they are even thickness all the way across.
Season both sides of all chicken pieces with salt and pepper.
Prepare a dredging station by setting out three shallow bowls or pie plates. Add the flour to one bowl. Add eggs and water to a second bowl; use a fork to beat the eggs and water together. Add the breadcrumbs, parmesan cheese, Italian seasoning, and garlic powder to the third bowl and stir to combine.
Dredge one piece of chicken through the flour, coating both sides. Next dip the chicken into the egg mixture and finally, into the breadcrumb mixture. Press the chicken down into the breadcrumbs to ensure they stick. Repeat step with remaining chicken pieces.
To a large, deep, oven-safe skillet over medium high heat, add frying oil to reach ½ inch in depth. When the oil begins to shimmer, add the breaded chicken pieces.
Cook for 3-4 minutes on each side, until the breading is deep golden brown and the chicken is cooked through to an internal temperature of 165°F.
Remove cooked chicken and drain any excess oil from the pan. Return the chicken to the pan.
Preheat your oven to 350°F.
Spoon marinara sauce over the chicken in the pan. Sprinkle mozzarella cheese over the marinara sauce. Bake for 5-8 minutes, or until the cheese melts.
Garnish with chopped parsley and serve.
Storage: Store in an airtight container in the refrigerator for up to 4 days.
Notes
If you would like to use thicker chicken breasts, proceed with the instructions to bread and fry them, but you do not have to cook them all the way through. Drain the excess oil from the pan and then bake in the oven the rest of the way until the chicken is cooked through. Then, top with marinara and cheese and pop back in the oven to melt the cheese.Remember to drain the oil from the pan before adding the chicken back in - we don’t want to eat extra oil with our chicken parmigiana.You can also pop the dish under the broiler to broil the cheese topping, if you prefer.