Preheat and prep: Heat your oven to 425°F (220°C).
Line a large sheet pan with parchment or lightly oil it. This helps prevent sticking and speeds up cleanup.
Make the marinade: In a small bowl, whisk together 2 tablespoons olive oil, lemon zest, lemon juice, garlic, Dijon, honey, salt, pepper, oregano, and smoked paprika. It should smell bright and garlicky.
Season the chicken: Place the chicken in a bowl and pour over about half of the marinade.
Toss to coat. Let it sit while you prep the veggies—5 to 10 minutes is plenty.
Prep the veggies: On the sheet pan, toss the potatoes, broccoli, bell pepper, and red onion with the remaining 1 tablespoon olive oil and a pinch of salt and pepper. Spread everything into a single layer.
Start the potatoes first (optional but helpful): If your potatoes are large, give the pan a 10-minute head start in the oven before adding the chicken.
This ensures everything finishes at the same time.
Add the chicken: Nestle the marinated chicken among the vegetables, pouring any extra marinade from the bowl over the chicken pieces.
Roast: Bake for 20–25 minutes, or until the chicken is cooked through (internal temp 165°F/74°C) and the vegetables are tender with caramelized edges.
Finish and garnish: Rest the chicken for a few minutes on the pan. Spoon any pan juices over the chicken and veggies. Sprinkle with chopped parsley and serve with lemon wedges for extra brightness.