Place chicken, potatoes, and garlic in a large roasting pan. In a medium bowl, whisk together chicken broth through lemon pepper. Pour marinade over chicken and potatoes, flipping multiple times to coat. Lay chicken pieces skin-side up, flat in bottom of pan, and tuck potatoes and garlic around them. Cover and refrigerate 8 to 24 hours.
Preheat oven to 425 F. Bake uncovered 40 to 45 minutes, until chicken reaches an internal temperature of 165 F and potatoes are fork-tender. If desired, transfer to a serving platter and garnish with fresh lemon slices.
Per serving: 585 calories, 37 grams fat (9 grams saturated fat), 33 grams total carbohydrates, 658 milligrams sodium, 155 milligrams cholesterol, 5 grams fiber, 30 grams protein.