Place the chicken in a roasting pan, drizzle and rub with the oil. Season with salt, pepper and sprinkle the thyme over the breast.
Stuff the small bun of thyme inside the chicken. Roast in a 400 degree oven for 1 hour, until the juice runs clear in the leg or until it reaches 160 degrees near the thigh bone.
Remove from the oven and allow to rest, covered with foil for 10 minutes. Transfer to a cutting board and reserve any juice.
In a large skillet on medium high heat, add the butter and peas. Cook for 1 minute, stirring the peas occasionally.
Add the spinach, season with salt and pepper, and drizzle the wine and reserved chicken juice over top.
Turn occasionally with tongs to evenly wilt the spinach. Takes only about 1 minute.
Remove the greens to a warm bowl, leaving the liquid to concentrate in the pan until only 4 tablespoons remain.
Carve the chicken into pieces and place onto a warm platter or serving dish with the spinach and peas. Drizzle chicken with pan glaze and garnish with fresh chives.