Preheat the oven to 400°F.
Place the halved baby potatoes on a large sheet pan. Drizzle with one tablespoon of olive oil and season with salt and pepper. Roast for about 15 minutes.
While the potatoes begin cooking, prepare the chicken and vegetables.
In a bowl, combine the remaining olive oil, garlic, lemon zest, lemon juice, and Italian seasoning.
Add the chicken to the bowl and coat it in the lemon garlic mixture.
Remove the sheet pan from the oven and add the chicken, broccoli, and bell pepper to the pan with the potatoes.
Drizzle any remaining lemon garlic mixture over the vegetables.
Return the pan to the oven and roast for another 20 to 25 minutes, until the chicken is cooked through and the vegetables are tender.
Garnish with fresh parsley or Parmesan if desired.
Serve warm and enjoy a dinner that is simple, flavorful, and perfect for the longer evenings of spring.