Preheat the oven. Preheat the oven to 350 degrees.
Place the veggies and broth into the pan. Place carrots, leeks, onions, and fresh herbs in a 9x13 roasting pan. Pour white wine or chicken broth into the pan.
Mix the old bay mixture. In a small bowl, stir together the butter and Old Bay seasoning.
Prep the turkey. Loosen the skin on the turkey breast with your fingers and spoon some of the butter mixture underneath the skin and also on top of the skin. Reserve some of the butter mixture to baste the turkey with as it roasts. Place the turkey on top of the vegetables in the roasting pan.
Bake. Roast the turkey in the oven for approx. 20 minutes per pound, until the turkey reaches an internal temperature of 165 degrees Fahrenheit.
Baste. While the turkey is cooking, take a basting brush and baste the remaining butter mixture all over the turkey as it cooks. Baste the turkey a couple of times during the cooking process.
Take the temperature. Use a meat thermometer to measure the temperature in the center of the thickest part of the breast. About 2 to 2 ½ hours to fully cook. Remove from the oven and cover loosely with aluminum foil. Let rest for 15 minutes, or until the internal temperature reaches 165 degrees Fahrenheit.
Serve. Slice turkey and serve with your favorite holiday sides.