Preheat the oven to 400 degrees Fahrenheit. While the oven heats, cut four pieces of aluminum foil 12x12 in size. Lay out the aluminum foil on the counter.
Chop all the vegetables. Divide the vegetables evenly among the 4 aluminum foil packets. Add minced garlic, additional salt and pepper, and Italian Seasoning to all the packets.
Rinse, and pat dry the chicken breast. Pound the chicken with a meat mallet, then cut each breast in half. The goal is for each piece of chicken to be equal in size. Season each chicken breast with salt and pepper.
Place each chicken breast on the aluminum foil. Then Drizzle ½ tablespoon olive oil in each packet. Pour ¼ cup marinara sauce on top of each chicken breast. Then, place a few sprigs of fresh parsley and oregano in each packet. Once your packet is complete, begin to fold packet like a taco, then crimp edges and roll until sealed. You should have no gaps in your foil packet--steam is what will cook this meal.
Place the packets on a baking tray and cook for 25 minutes or until the internal temperature of the chicken reaches 165 degrees Fahrenheit.
Carefully open packets and eat as is or serve alongside with pasta.