01 - Preheat your oven to 400°F (200°C). Lightly grease a baking dish with cooking spray or a thin layer of oil.
02 - In a mixing bowl, whisk together the Dijon mustard, whole grain mustard, honey, olive oil, minced garlic, lemon juice, paprika, salt, and black pepper until smooth and well combined.
03 - Pat the chicken breasts dry with paper towels and arrange them in a single layer in the prepared baking dish.
04 - Pour the honey mustard sauce evenly over the chicken breasts, turning each piece to ensure thorough coating on all sides.
05 - Bake uncovered for 25-30 minutes, or until the chicken is cooked through and juices run clear. The internal temperature should reach 165°F (74°C) when measured with a meat thermometer.
06 - For a caramelized golden top, switch the oven to broil for 2-3 minutes, watching closely to prevent burning.
07 - Remove from the oven, garnish with freshly chopped parsley, and serve hot with your choice of side dishes.