Preheat the oven to 450ºF. Place an empty half sheet pan inside the oven and let it get hot.
Marinade
Combine all of the ingredients in a bowl and whisk together until well mixed in.
In a separate large bowl, toss together the veggies, marinade and chicken until evenly coated.
Start Cooking
Remove the sheet pan from the oven and transfer the fajitas onto the hot surface. then arrange in a single layer so they cook evenly.
Place back in the oven and half way cook it, about 10-15 minutes.
Remove Juices and cook
Take the juices released so far and carefully pour into a sauce pan by tilting the sheet pan over it.
Cook the juices on a gentle simmer for 10 minutes. Should fully cook and reduced down for more intense flavors.
Finish Cooking the Fajitas
Meanwhile, set the oven to broil on high and finish cooking the fajitas, about ten minutes.
Mid-time, rotate the pan for an even char.
Once the fajitas are fully cooked, remove from the oven. The internal temperature should read 185ºF . Garnish with cilantro and serve with a side of frijoles de la olla, Mexican white rice, and corn tortillas. Lastly, drizzle the cooked juices over the fajitas for an added boost of flavor.