01 - Preheat oven to 425°F for roasting potatoes.
02 - Toss halved potatoes with olive oil, salt, pepper, rosemary, and minced garlic in a bowl. Spread evenly on baking sheet cut side down.
03 - Roast potatoes for 35–40 minutes, flipping halfway through, until golden and crispy.
04 - Combine olive oil, smoked paprika, garlic powder, oregano, salt, pepper, and lemon juice in a bowl.
05 - Add chicken breasts to marinade and coat thoroughly. Let marinate for at least 10 minutes.
06 - Preheat grill or grill pan over medium-high heat. Grill chicken 5–6 minutes per side until internal temperature reaches 165°F.
07 - Transfer chicken to cutting board and rest for 5 minutes, then slice.
08 - Arrange grilled chicken alongside roasted potatoes. Garnish with chopped parsley and lemon wedges.