Preheat oven to 425°F and line a large sheet pan with parchment paper.
In a bowl, whisk together honey, Dijon mustard, olive oil, garlic, spices, and lemon juice until smooth.
Add chicken thighs to the bowl and coat well. Let marinate for 15–30 minutes or use immediately.
Place potatoes, carrots, and onion on the sheet pan. Drizzle lightly with olive oil and sprinkle with salt. Toss to combine.
Move vegetables to one side of the pan. Place chicken thighs on the other side, skin side up. Pour any remaining marinade over the chicken.
Bake for 35–45 minutes, until chicken reaches 165°F and vegetables are tender.
Optional: Broil for 2–3 minutes at the end for a golden, caramelized finish.
Serve warm, spooning pan juices over the chicken and vegetables.