Preheat the oven to 425°F (220°C).
Line a large rimmed sheet pan with parchment for easy cleanup.
Prep the vegetables: Halve the baby potatoes. Slice the peppers and onion. Cut broccoli into bite-size florets.
Pat everything dry with paper towels so it roasts instead of steams.
Season the vegetables: On the sheet pan, toss potatoes, peppers, onion, and broccoli with 2 tablespoons olive oil, 1 teaspoon salt, and half the pepper. Spread in a single layer, keeping potatoes cut-side down for better browning.
Par-roast the potatoes for 10 minutes if you like them extra tender. This helps them cook through without overcooking the other veg.
Season the chicken: In a bowl, mix smoked paprika, garlic powder, onion powder, oregano, remaining salt, remaining pepper, 1 tablespoon olive oil, and lemon zest.
Add chicken and toss to coat evenly.
Add chicken to the pan: Nestle the chicken pieces among the vegetables. Avoid crowding; use a second sheet pan if needed for good browning.
Roast for 18–22 minutes, until the chicken reaches an internal temperature of 165°F and the vegetables are tender with browned edges. If you want extra color, broil for 2–3 minutes at the end.
Finish and rest: Squeeze lemon wedges over everything.
Let the chicken rest for 5 minutes before slicing or portioning.
Portion for meal prep: Divide into 4–5 containers. Add optional toppings like feta, parsley, or a drizzle of olive oil.