Season chicken pieces with the salt and pepper. Whisk together the Ketchup, apple cider vinegar, brown sugar, minced garlic and Cajun seasoning in a bowl. Brush the sauce on all the chicken pieces.

Bake in a sprayed 10 inch iron skillet or a regular baking dish in a preheated 400 degree oven for 35 to 40 minutes testing meat with a thermometer to make sure it is cooked before removing from the oven. Internal temperature should reach 165 degrees Fahrenheit for oven baked chicken.