Preheat your oven to 400°F. Line a large baking sheet with parchment paper for easy cleanup.
In a shallow bowl, combine the Parmesan cheese, panko breadcrumbs, garlic powder, onion powder, Italian seasoning, salt, and pepper. Mix well.
Pat the chicken breasts dry with paper towels. Dip each chicken breast into the breadcrumb mixture, pressing gently to adhere the coating evenly on both sides.
Place the coated chicken breasts on one side of the prepared baking sheet.
In a mixing bowl, toss the broccoli florets and cherry tomatoes with olive oil, lemon juice, salt, and pepper. Spread the vegetables on the other side of the baking sheet.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through (internal temperature of 165°F) and the vegetables are tender.
For extra crispiness, broil the chicken for an additional 2-3 minutes at the end of cooking.
Let the chicken rest for a few minutes before slicing. Serve with the roasted vegetables on the side.