I love to get things ready ahead of time. I start Christmas crafting before it gets hot each year, and am a sucker for a good crock pot recipe. This one isn't for the slow cooker, but it can be prepared ahead of time, left in the oven while you are out, and be ready to eat when you get home.
I used a local chicken from the grassfed place at the Central Market, local new red potatoes, local onions, local Brussels sprouts, and local celery in this, and it turned out wonderful. I have also used beets, turnips, sweet potatoes, and eggplant (and probably other things I can't remember) with good success. I would encourage you to use whatever is fresh and local in your future roasts!
Roasted Chicken With Vegetables
whole chicken (about 5 lbs.)
1 lb. carrots
1 lb. potatoes
1 lb. Brussels sprouts
3 stalks celery
2 large onions
salt and pepper
Wash chicken (remove any "parts" from inside), and place in a roasting pan. Wash and chop veggies coarsely. Arrange them around the chicken. Salt and pepper chicken and vegetables. Cover and cook at 275 F for about 2 1/2 hours. (- or until you get back home. Really, anywhere from 2 to 4 hours has worked for me. At low heat, it is less risky to leave it for a long time.) Serve chicken and veggies dressed with pan juices and olive oil.