01 - Whisk together lemon juice, lemon zest, 3 tablespoons olive oil, minced garlic, honey, Dijon mustard, thyme, salt, and black pepper in a medium bowl.
02 - Place chicken breasts in a shallow dish or resealable bag. Pour half of the marinade over chicken, turning to coat. Reserve remaining marinade. Let marinate at room temperature for 15 minutes or refrigerate up to 2 hours.
03 - Heat 1 tablespoon olive oil in a large skillet over medium-high heat. Remove chicken from marinade and discard used marinade. Cook chicken for 5 to 6 minutes per side until golden and internal temperature reaches 165°F (74°C). Transfer to plate and cover loosely with foil.
04 - Add reserved marinade and chicken broth to skillet. Simmer for 3 to 4 minutes, scraping up browned bits, until sauce reduces slightly.
05 - Return chicken to skillet, spoon sauce over top, and simmer for 2 minutes to warm through.
06 - Plate chicken and garnish with chopped parsley and optional lemon slices.