Preheat the oven to 425°F.
Lightly spray a baking sheet with olive oil.
Pound the chicken breast to an even thickness for uniform cooking.
Whisk the egg white in a shallow bowl. In another shallow dish, combine the panko breadcrumbs with grated Parmesan cheese.
Dip the chicken breast first in the egg white, then coat evenly in the breadcrumb mixture.
Place the breaded chicken on the prepared baking sheet and lightly spray the top with olive oil spray.
Bake the chicken for about 20-25 minutes until the coating is golden and the internal temperature reaches 165°F.
Meanwhile, toss the broccoli and zucchini with a light spray of olive oil and a pinch of salt.
Spread the vegetables on another baking tray and roast in the oven for about 15 minutes, or until tender and slightly browned.
Once the chicken is done, spoon the tomato sauce over the top and, if desired, return to the oven for an additional 2-3 minutes for a warm sauce finish.
Plate the chicken with a side of roasted vegetables and enjoy your healthy, crispy Chicken Parmesan.