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Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easier cleanup.

In a large bowl, combine the olive oil, balsamic vinegar, Dijon mustard, dried thyme, garlic powder, salt, and black pepper. Whisk until well combined.

Add the cut chicken breasts, carrots, parsnips, red onion, and Brussels sprouts to the bowl with the balsamic mixture. Toss everything together until the chicken and vegetables are evenly coated.

Spread the chicken and vegetables in a single layer on the prepared baking sheet. Ensure there's enough space between pieces for even roasting; use two baking sheets if necessary to avoid overcrowding.

Roast for 20 minutes. Then, remove the baking sheet from the oven and gently toss the chicken and vegetables to ensure even cooking and browning.

Return the baking sheet to the oven and continue roasting for another 10-15 minutes, or until the chicken is cooked through (internal temperature reaches 165°F or 74°C) and the vegetables are tender and slightly caramelized.

Remove from the oven. Garnish with fresh chopped parsley, if desired. Serve immediately with a side of quinoa or brown rice, if desired.


Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easier cleanup.

In a large bowl, combine the olive oil, balsamic vinegar, Dijon mustard, dried thyme, garlic powder, salt, and black pepper. Whisk until well combined.

Add the cut chicken breasts, carrots, parsnips, red onion, and Brussels sprouts to the bowl with the balsamic mixture. Toss everything together until the chicken and vegetables are evenly coated.

Spread the chicken and vegetables in a single layer on the prepared baking sheet. Ensure there's enough space between pieces for even roasting; use two baking sheets if necessary to avoid overcrowding.

Roast for 20 minutes. Then, remove the baking sheet from the oven and gently toss the chicken and vegetables to ensure even cooking and browning.

Return the baking sheet to the oven and continue roasting for another 10-15 minutes, or until the chicken is cooked through (internal temperature reaches 165°F or 74°C) and the vegetables are tender and slightly caramelized.

Remove from the oven. Garnish with fresh chopped parsley, if desired. Serve immediately with a side of quinoa or brown rice, if desired.
