First things first, preheat your oven to around 400°F (200°C). While that's heating up, take your breaded chicken out of the fridge and let it sit at room temperature for about 10-15 minutes. This will help it cook more evenly, trust me!
Now, line a baking sheet with some aluminum foil or parchment paper, and place your chicken on it. You can also add some extra seasonings or herbs if you're feeling fancy. Don't be shy, get creative!
Pop that baking sheet into the oven and let the magic happen. Depending on the size and thickness of your chicken, it'll take around 15-25 minutes to reheat. Just keep an eye on it, and you'll be golden.
Toaster Oven Fried Chicken Reheat at Wayne Loeffler blog