01 - Preheat oven to 400°F.
02 - Pat chicken breasts dry and season both sides generously with salt and pepper.
03 - Heat olive oil in large ovenproof skillet over medium-high heat. Sear chicken 2-3 minutes per side until golden. Remove from heat.
04 - Whisk both mustards, honey, hot sauce, Worcestershire, tomato paste, vinegar, garlic, smoked paprika, and cayenne until smooth.
05 - Pour Diablo sauce evenly over chicken, ensuring each breast is thoroughly coated.
06 - Transfer skillet to oven. Bake 18-22 minutes until chicken reaches internal temperature of 165°F.
07 - Remove from oven and let rest 5 minutes. Spoon remaining sauce over chicken. Garnish with parsley and lemon wedges.