Start to bake chicken on a rimmed edge baking sheet, with a rack, on 350 for about 45 minutes. While chicken is baking, using a small saucepan, simmer marinade over medium heat. Cook until reduced by about half, less than 10 minutes. Baste the chicken frequently with the reduced sauce, as soon as it is ready, for the rest of the baking time. This method will leave you with a thicker glaze on the outside of your chicken breasts. Just as delicious but a bit more work!