Preheat the oven. Set it to 400°F (200°C).
Line a baking dish with foil or parchment for easier cleanup.
Make the sauce. In a bowl, whisk together honey, Dijon, whole-grain mustard, olive oil, vinegar or lemon juice, garlic, paprika, salt, and pepper. Taste and adjust—add more honey for sweetness or more mustard for tang.
Prep the chicken. Pat the chicken dry with paper towels. This helps the sauce cling and the skin (if using thighs) get a bit of color.
Coat the chicken. Place the chicken in the baking dish and pour about two-thirds of the sauce over it.
Turn the pieces to coat well. Reserve the remaining sauce for basting.
Bake. Put the dish in the oven and bake for 20 minutes (breasts) or 25 minutes (thighs). Spoon on the reserved sauce and return to the oven.
Finish cooking. Bake another 10–15 minutes, until the chicken reaches an internal temperature of 165°F (74°C).
The sauce should be thickened and lightly caramelized at the edges.
Rest and garnish. Let the chicken rest for 5 minutes. Spoon pan juices over the top and sprinkle with fresh herbs if you like.
Serve. Pair with roasted carrots, green beans, mashed potatoes, rice, or a simple green salad. Don’t skip the pan sauce.