Preheat your oven to 400°F and line a baking sheet with parchment paper.
Pound the chicken breast to an even thickness for uniform cooking.
In a shallow dish, whisk the egg white. In another dish, combine whole wheat breadcrumbs, Parmesan cheese, Italian seasoning, and garlic powder.
Dip the chicken breast into the egg white, ensuring full coverage, then coat evenly with the breadcrumb mixture.
Place the breaded chicken on the baking sheet and lightly spray with cooking spray or brush with a tiny bit of olive oil if desired.
Bake the chicken in the preheated oven for 20-25 minutes, or until the internal temperature reaches 165°F and the coating is crispy.
While the chicken bakes, toss the green beans with olive oil, a pinch of salt, and additional Italian seasoning if desired, then spread on a separate baking tray.
Roast the green beans in the oven for 15 minutes until tender and slightly charred at the edges.
Plate the chicken and green beans together, and enjoy your crisp, flavorful meal.