• Place rack in upper third of oven and preheat to 400 degrees.
• Wash chicken inside and out with cold water, remove the giblets, then let the chicken drain, cavity down, in a colander
  until it reaches room temp (about 15 minutes). Pat dry with paper towels.
• Pour lemon juice all over the chicken (inside and outside). Season with salt and pepper. Prick the whole
  lemons three times with a fork and place deep inside the cavity. (Tip: If lemons are hard,
  roll on countertop with your palm to get juices flowing.)
• Place the bird breast-side down on a rack in a roasting pan, lower heat to 350 degrees and bake uncovered for 15 minutes.
• Remove from oven and turn it breast-side up (use wooden spoons!); return it to oven for 35
  minutes more.
• Test for doneness—a meat thermometer inserted in the thigh should read 180
  degrees, or juices should run clear when chicken is pricked with a fork.
• Continue baking if necessary.
• Let chicken cool for a few minutes before carving. Serve with juices.

I got this from Glamour magazine, here's the story:

How to...make "engagement chicken"
By Tiffany Blackstone

Engagement Chicken
First comes chicken, then comes marriage? Be skeptical if you must, but this recipe may be
charmed. It all began 22 years ago, when then-Glamourfashion editor Kim Bonnell gave the
recipe to her assistant, Kathy Suder, who made the chicken for her boyfriend, who, a month
later, asked her to marry him. "It's a meal your wife would make. It got me thinking," says
Jon Suder, who now has three children with Kathy. Details of the simple dish passed from
assistant to assistant like a culinary chain letter. When Bonnell heard that her recipe had
inspired three weddings, she dubbed it Engagement Chicken. Try the recipe, give it to a
friend— oh, and let us know when it works!