01 - Preheat the oven to 400°F and line a rimmed baking sheet with parchment paper or foil for easy cleanup.
02 - In a small bowl, mix olive oil, lemon zest and juice, garlic, rosemary, thyme, salt, and pepper. Rub thoroughly over the turkey breast, including beneath the skin if possible.
03 - In a large bowl, combine carrots, potatoes, and red onion with olive oil, salt, and pepper. Spread the vegetables evenly on the prepared sheet pan.
04 - Place the seasoned turkey breast skin side up in the center of the vegetables on the sheet pan.
05 - Roast for 50–60 minutes until the turkey reaches 165°F internally and vegetables are tender. Toss vegetables halfway through roasting.
06 - Remove from oven and let the turkey rest for 10 minutes. Slice and serve alongside the roasted vegetables with an optional squeeze of fresh lemon juice.