Prep the Chicken and Potatoes
Pat chicken pieces dry with paper towels. Trim excess skin or fat if needed.
Peel (optional) and cut potatoes into even wedges so they cook at the same rate. Soak wedges in cold water 20–30 minutes, then drain and pat dry to help them crisp.
Make the Lemon Marinade
In a large bowl, whisk together olive oil, lemon juice, garlic, oregano, thyme, salt, pepper, and mustard until emulsified.
Marinate the Chicken
Add chicken pieces to the bowl (or a large zip‑top bag) and toss to coat well.
Marinate in the fridge at least 4 hours and up to 24 hours for best flavor. If short on time, 30–60 minutes at room temperature still adds good flavor.
Season the Potatoes
In a separate bowl, toss potato wedges with a few spoonfuls of the marinade, plus the potato salt, pepper, and paprika.
Let sit while the oven preheats so they absorb flavor.
Arrange in the Pan
Preheat oven to 425°F (220°C). Lightly oil a large roasting pan or 13×9‑inch baking dish.
Pour a little olive oil into the pan, then scatter the potatoes in an even layer.
Nestle the marinated chicken pieces on top and between the potatoes, skin‑side up, without overcrowding.
Pour any remaining marinade over everything. Add the chicken broth to the bottom of the pan (not over the skin). Arrange lemon slices over the chicken and potatoes.
Roast Covered, Then Uncovered
Cover pan tightly with foil and roast 35–40 minutes. This steams the chicken and potatoes so they become tender and flavorful.
Remove foil and continue roasting 20–25 minutes, until the chicken skin is golden and crisp and potatoes are tender.
If needed, broil for 2–4 minutes at the end to deepen browning.
Check Doneness and Serve
Use a meat thermometer: thighs/drumsticks should reach at least 175°F (79°C), breasts 165°F (74°C) for juicy meat.
Let rest 5–10 minutes. Sprinkle with parsley and scatter kalamata olives on top, if using.
Serve hot with pan juices spooned over the chicken and potatoes.