01 - Preheat oven to 400°F. Lightly grease a baking dish with olive oil or nonstick spray.
02 - In a mixing bowl, whisk together Dijon mustard, whole grain mustard, honey, olive oil, minced garlic, lemon juice, paprika, salt, and pepper until smooth and well combined.
03 - Pat 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 to 30 minutes, until the chicken is fully cooked through and juices run clear. The internal temperature should reach 165°F when checked with a meat thermometer.
06 - For a caramelized golden top, switch the oven to broil for 2 to 3 minutes, watching carefully to prevent burning.
07 - Remove from the oven, garnish with freshly chopped parsley, and serve immediately while hot.