Preheat your oven to 400°F. Line a baking tray with parchment paper.
Prepare the chicken by pounding the 4 oz breast to an even thickness for uniform cooking.
Whisk the egg in a shallow bowl. In a separate bowl, combine the whole wheat breadcrumbs with a pinch of salt and pepper.
Dip the chicken breast first in the egg, then dredge thoroughly in the breadcrumb mixture, ensuring an even coating.
Place the breaded chicken on a lightly greased baking tray and lightly drizzle or brush with olive oil.
Bake the chicken in the preheated oven for 20-25 minutes or until the internal temperature reaches 165°F, flipping halfway through if necessary.
Once the chicken is almost finished, warm the marinara sauce in a small saucepan or microwave.
Remove the chicken from the oven, spoon a moderate layer of marinara sauce over the top, and sprinkle the grated Parmesan cheese evenly.
Return the chicken to the oven for an additional 5 minutes to allow the cheese to melt slightly.
Meanwhile, toss the broccoli florets with a dash of olive oil, salt, and pepper, then spread them on another baking sheet. Roast in the oven for about 15 minutes until tender and slightly charred.
Plate the crispy Chicken Parmesan with a generous side of roasted broccoli. Enjoy your balanced and flavorful meal!