In a medium bowl, whisk together the vinegar, honey, dijon mustard, Italian seasoning, and red pepper flakes.
Place the chicken in a large resealable plastic bag, and pour marinade over chicken. Refrigerate for 30 minutes.
While chicken is marinating, toss the vegetables in a large bowl with olive oil and Italian seasoning.
Preheat oven to 425°(F).
Fit a large sheet pan with parchment.
Remove the chicken from the bag and place on sheet pan.
Bake chicken at 425°(F) for 15 minutes.
After 15 minutes remove sheet pan from oven and arrange the vegetables around the chicken.
Bake for 10 additional minutes or until internal temperature of chicken registers 165°(F) and the vegetables are cooked through.
Serve and enjoy!