Sprinkle 1 tsp. lemon pepper over breasts and bake in a 350-degree oven for 20 minutes. Mix remaining ingredients together (including the other teaspoon of lemon pepper) and pour over partially baked chicken. Bake another 20-40 minutes (depending on the size of your chicken breasts) until internal temperature registers 160 degrees and juices run clear. Let sit for ten minutes to allow sauce to thicken.