01 - Toss chicken pieces with black pepper, half the lemon zest, and ½ teaspoon salt until evenly coated.
02 - Heat olive oil in a large skillet over medium-high heat. Add chicken and cook for 5 minutes, stirring occasionally, until lightly browned. Remove chicken to a plate and set aside.
03 - Add onion to skillet and cook for 3 minutes, stirring frequently, until softened. Incorporate garlic and cook for 30 seconds until fragrant.
04 - Stir orzo into onion mixture and cook for 1 minute, allowing pasta to lightly toast.
05 - Pour in chicken broth and remaining salt. Return chicken to skillet and bring mixture to a boil. Reduce heat to medium-low and cover. Simmer for 8 minutes.
06 - Uncover skillet and stir in broccoli florets. Cover again and cook for 3–4 minutes, until broccoli is crisp-tender and orzo is al dente.
07 - Fold in butter, lemon juice, Parmesan cheese, and remaining lemon zest. Stir until melted and creamy. Taste and adjust salt or pepper as needed.
08 - Transfer skillet contents to serving bowls and garnish with fresh parsley.