Preheat oven to 400° F. Spray a baking pan with non-stick spray.
Pound chicken to approximately ½" thickness. If chicken pieces are very thick and uneven you may want to slice in half to make two thinner pieces before pounding to an even ½" thickness.
You will need three bowls that will be large enough for each chicken breast to fit easily (pie plates or storage containers will also work). - In bowl one: mix flour and Italian seasoning. - In bowl two: mix milk and eggs. - In bowl three: mix breadcrumbs, garlic powder and parmesan cheese.
Line up your workspace as follows: chicken, flour mixture, egg mixture, bread crumb mixture, sprayed baking pan.
Place each chicken breast in the flour and make sure it is completely coated with flour.
Move the chicken breast to the egg mixture and make sure it is coated.
Coat the chicken with breadcrumbs and move to the prepared baking pan.
Repeat with all breasts. Generously spray the chicken breasts with cooking spray.
Bake at 400°F for approximately 10 minutes, then GENTLY flip over trying not to dislodge the crust.
Top with marinara sauce and shredded cheese. Bake for another 10 minutes until the chicken is cooked completely and the cheese is melted.