Preheat then oven to 400℉ or 200℃ (180°C for fan ovens).
Prepare the vegetables and place on a baking tray or sheet pan.
Drizzle the vegetables about 2 tablespoons of the olive oil and 1 tablespoon of the maple syrup.
Toss the vegetables to coat them with the oil and maple syrup.
Sprinkle with a bit of salt and pepper.
Roast the vegetables in the oven, turning one or twice for about 25 to 35 minutes or until just beginning to turn golden.
Meanwhile, season the chicken breasts well with salt and pepper.
Heat the remaining 2 tablespoons of oil in a large frying pan with a lid.
Sauté the chicken breasts for about four minutes each side over medium heat, turning once.
Remove the chicken breasts to a plate and cover with aluminum foil.
Turn the heat up on the pan and add the vinegar.
Move the vinegar around on the pan a bit and let it bubble. (This is called de-glazing the pan.)
Now add the remaining 4 tablespoons of maple syrup and chicken stock and stir, letting it all bubble together a bit and reduce. Now reduce the heat back to medium.
Return the chicken breasts to the pan and continue to cook for three or four minutes each side or until no pink remains inside. While you are doing this, the liquid should continue to reduce into a gorgeous sticky sauce.
When the chicken is done, serve with the roast carrots and parsnips.
Garnish with the sauce and some parsley if desired.