01 - Preheat oven to 400°F. Line a rimmed baking sheet with parchment paper or foil.
02 - Combine olive oil, lemon zest, lemon juice, minced garlic, rosemary, thyme, salt, and black pepper in a small bowl. Rub mixture over turkey breast, including beneath the skin if possible.
03 - In a large bowl, toss carrots, halved baby potatoes, and red onion with olive oil, salt, and black pepper.
04 - Spread seasoned vegetables evenly on the sheet pan. Place the turkey breast skin-side up in the center among the vegetables.
05 - Roast in oven for 50 to 60 minutes, until turkey reaches an internal temperature of 165°F and vegetables are tender. Toss vegetables halfway through cooking.
06 - Remove from oven and let the turkey rest for 10 minutes before slicing. Serve turkey slices with roasted vegetables and a squeeze of fresh lemon juice if desired.