Sheet Pan Balsamic Chicken and Veggies

Name: Sheet Pan Balsamic Chicken and Veggies
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: American
Ingredients: 3 tablespoons balsamic vinegar; 1/2 cup avocado or olive oil; 4 garlic cloves, minced; 1 teaspoon brown or Dijon mustard (optional); 3 tablespoons fresh basil, finely chopped + additional for topping (could also use a mix of fresh thyme and basil); ½ teaspoon sea salt; ¼ teaspoon black pepper; 1¼ lbs. boneless, skinless chicken breast, tenders or thighs (if large, cut in half); 3 small heads of broccoli, chopped into pieces (about 4-5 cups total); 3-4 medium carrots, peeled and cut into skinny sticks (see note below)**; 2 cups button mushrooms, halved or quartered if large; 1 small red onion, diced into larger chunks; 1 cup cherry or grape tomatoes