Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper.
Slice the sweet potato into wedges and toss with olive oil, salt, and garlic powder. Spread them on one side of the baking sheet.
Cut the broccoli into florets, season with salt, pepper, and a sprinkle of garlic powder, and add to the baking sheet.
Pat the chicken breast dry. If needed, lightly pound to even thickness for quicker, uniform cooking.
Prepare a dipping station: In one shallow bowl, whisk the egg white; in another plate, place the whole wheat breadcrumbs mixed with a pinch of salt, pepper, and garlic powder.
Dip each chicken cutlet first into the egg white, then coat evenly with the breadcrumb mixture.
Place the breaded chicken cutlets on the baking sheet, leaving space between them and the vegetables.
Roast everything in the preheated oven for about 20-25 minutes, flipping the vegetables halfway through and ensuring the chicken reaches an internal temperature of 165°F (74°C).
Once cooked, remove from the oven and let it rest for a few minutes before serving.