Preheat your oven to 400°F. Spray a large sheet pan with cooking spray. If your pan isn’t nonstick, consider lining it with parchment paper.
In a bowl, whisk together the balsamic vinegar and zesty Italian dressing.
Trim any excess fat or undesired parts from the chicken tenderloins. If using chicken breasts, cut them into smaller pieces.
Take about 1/3 cup of the balsamic/Italian mixture and place it into a large resealable bag. Add in the marinated chicken, ensuring each piece is well-coated.
While the chicken is marinating, prep your vegetables. Chop the broccoli into bite-sized pieces and slice the baby carrots in half.
Place the broccoli and carrots on the prepared sheet pan, along with the cherry tomatoes.
Season the vegetables with the Italian seasoning, drizzle with olive oil, sprinkle on the garlic powder, and season with salt and pepper to taste.
Roast your vegetables in the oven for about 10 to 15 minutes.
After that, remove the pan from the oven and give the vegetables a little flip. Push them to the sides of the pan, creating space in the center for the chicken.
Carefully take the marinated chicken out of the fridge and discard any remaining marinade. Place the marinated chicken in the center of the pan.
Return the pan to the oven and cook for another 7 to 15 minutes, depending on the size of your chicken pieces.
Once done, serve your One Pan Balsamic Chicken and Veggies hot from the oven, drizzling any extra marinade over the top.