Preheat the oven to 400°F (200°C).
Prepare the baking sheet by lining it with parchment paper or lightly greasing it.
In a shallow bowl, whisk together the eggs, garlic powder, Italian seasoning, salt, and pepper.
In a separate bowl, combine the breadcrumbs and grated Parmesan cheese evenly.
Dip each chicken breast into the egg mixture, allowing excess to drip off, then coat thoroughly in the breadcrumb mixture.
Place the coated chicken breasts on the prepared baking sheet, spacing them apart for even cooking.
Toss the colorful veggies in a bowl with olive oil, salt, and pepper before arranging them around the chicken on the baking sheet.
Bake in the preheated oven for 25-30 minutes, or until the chicken reaches an internal temperature of 165°F (75°C).
If desired, broil the chicken for an additional 2-3 minutes for extra crispiness.
Remove from the oven and let the chicken rest for a few minutes before serving with the roasted vegetables.