Preheat oven to 400 degrees Fahrenheit or set broiler to high.
Cook spaghetti in a large pot of salted boiling water according to package instructions until al dente.
Season chicken cutlets with salt and pepper.
Prepare three shallow bowls: one with flour, one with beaten eggs, and one with a mixture of panko, Parmesan, oregano, and garlic powder.
Coat each chicken breast in flour, dip in eggs, then press into the breadcrumb mixture until fully coated.
Heat olive oil in a large oven-safe skillet over medium-high heat.
Fry chicken for 3 to 4 minutes per side until golden brown and internal temperature reaches 165 degrees Fahrenheit.
Spoon 0.25 cup of marinara sauce over each chicken breast and top with mozzarella cheese.
Transfer skillet to the oven or broiler for 2 to 3 minutes until cheese is melted and bubbly.
Drain pasta and toss with the remaining marinara sauce.
Serve chicken over the pasta and garnish with chopped parsley.