Preheat the oven to 400 degrees.Process the veggies and the chicken.Place the raw chicken and veggies on a large sheet pan. If you do not have a large sheet pan, or if the pan is too full, use 2 sheet pans. If your pan is too crowded your vegetables will steam instead of roasting. Drizzle the chicken and vegetables with olive oil. With clean hands toss the chicken and veggies to coat with the olive oil.Sprinkle with salt and pepper.
Place the sheet pan dinner in the oven and set the timer for 20 minutes.
Then, toss the veggies and then place back in the oven for an additional 10 minutes.
Drizzle the BBQ Vinaigrette over the chicken and vegetables and serve warm.