Preheat oven to 425°F (220°C) and line a large baking sheet with parchment paper.
Slice the russet potato into thin wedges and pat dry with a paper towel to ensure maximum crispiness.
Cut the chicken breast into even strips.
In a large bowl, toss the potato wedges and chicken strips with olive oil, garlic powder, smoked paprika, oregano, salt, and pepper until well coated.
Spread the chicken and potatoes in a single layer on the baking sheet, ensuring they are not crowded.
Bake for 20-25 minutes, flipping halfway through, until the chicken is cooked through and the fries are golden brown.
Add the broccoli florets to the tray for the last 8 minutes of roasting until tender-crisp.
Serve immediately while hot and crispy.