Whip out these flavorful Sheet Pan Chicken Fajitas for a fast and tasty weeknight dinner! Just combine chicken, peppers, onions, and some delicious fajita seasoning onto a baking. Then, roast it all to crispiness in the oven. It's as easy as that! Serve these juicy fajitas with warm tortillas, your most loved toppings like sour cream, and a squeez