Season the chicken with salt, pepper, granulated garlic and thyme.
Coat the chicken with canola oil
Let this sit in the refrigerator overnight if you have time. If you don't have time, let the seasoned chicken remain at room temperature while you prepare the vegetables (no more than 45 minutes)
Wash the potatoes but don't peel them. Cut them into quarters
Peel the carrots and cut into 3 large pieces
Slice the onion
All the vegetables including the onion and garlic to the sheet pan, toss with 1 tablespoon of canola oil, season with salt and pepper and place in one layer on the sheet pan,
Arrange the chicken on top of the vegetables
Cover the pan tightly with aluminum foil
Cook in the oven for 30 minutes at 425 degrees
Remove the aluminum foil and cook for another 30-40 minues